tcp_usrreq.c revision 1.136.2.3
1 /* $NetBSD: tcp_usrreq.c,v 1.136.2.3 2007/12/03 16:15:11 joerg 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 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the NetBSD 55 * Foundation, Inc. and its contributors. 56 * 4. Neither the name of The NetBSD Foundation nor the names of its 57 * contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 61 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 62 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 63 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 64 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 65 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 66 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 67 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 68 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 69 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 70 * POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * Copyright (c) 1982, 1986, 1988, 1993, 1995 75 * The Regents of the University of California. All rights reserved. 76 * 77 * Redistribution and use in source and binary forms, with or without 78 * modification, are permitted provided that the following conditions 79 * are met: 80 * 1. Redistributions of source code must retain the above copyright 81 * notice, this list of conditions and the following disclaimer. 82 * 2. Redistributions in binary form must reproduce the above copyright 83 * notice, this list of conditions and the following disclaimer in the 84 * documentation and/or other materials provided with the distribution. 85 * 3. Neither the name of the University nor the names of its contributors 86 * may be used to endorse or promote products derived from this software 87 * without specific prior written permission. 88 * 89 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 90 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 91 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 92 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 93 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 94 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 95 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 96 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 97 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 98 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 99 * SUCH DAMAGE. 100 * 101 * @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95 102 */ 103 104 #include <sys/cdefs.h> 105 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.136.2.3 2007/12/03 16:15:11 joerg Exp $"); 106 107 #include "opt_inet.h" 108 #include "opt_ipsec.h" 109 #include "opt_tcp_debug.h" 110 #include "opt_mbuftrace.h" 111 #include "rnd.h" 112 113 #include <sys/param.h> 114 #include <sys/systm.h> 115 #include <sys/kernel.h> 116 #include <sys/malloc.h> 117 #include <sys/mbuf.h> 118 #include <sys/socket.h> 119 #include <sys/socketvar.h> 120 #include <sys/protosw.h> 121 #include <sys/errno.h> 122 #include <sys/stat.h> 123 #include <sys/proc.h> 124 #include <sys/domain.h> 125 #include <sys/sysctl.h> 126 #include <sys/kauth.h> 127 128 #include <net/if.h> 129 #include <net/route.h> 130 131 #include <netinet/in.h> 132 #include <netinet/in_systm.h> 133 #include <netinet/in_var.h> 134 #include <netinet/ip.h> 135 #include <netinet/in_pcb.h> 136 #include <netinet/ip_var.h> 137 #include <netinet/in_offload.h> 138 139 #ifdef INET6 140 #ifndef INET 141 #include <netinet/in.h> 142 #endif 143 #include <netinet/ip6.h> 144 #include <netinet6/in6_pcb.h> 145 #include <netinet6/ip6_var.h> 146 #include <netinet6/scope6_var.h> 147 #endif 148 149 #include <netinet/tcp.h> 150 #include <netinet/tcp_fsm.h> 151 #include <netinet/tcp_seq.h> 152 #include <netinet/tcp_timer.h> 153 #include <netinet/tcp_var.h> 154 #include <netinet/tcp_congctl.h> 155 #include <netinet/tcpip.h> 156 #include <netinet/tcp_debug.h> 157 158 #include "opt_tcp_space.h" 159 160 #ifdef IPSEC 161 #include <netinet6/ipsec.h> 162 #endif /*IPSEC*/ 163 164 /* 165 * TCP protocol interface to socket abstraction. 166 */ 167 168 /* 169 * Process a TCP user request for TCP tb. If this is a send request 170 * then m is the mbuf chain of send data. If this is a timer expiration 171 * (called from the software clock routine), then timertype tells which timer. 172 */ 173 /*ARGSUSED*/ 174 int 175 tcp_usrreq(struct socket *so, int req, 176 struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l) 177 { 178 struct inpcb *inp; 179 #ifdef INET6 180 struct in6pcb *in6p; 181 #endif 182 struct tcpcb *tp = NULL; 183 int s; 184 int error = 0; 185 #ifdef TCP_DEBUG 186 int ostate = 0; 187 #endif 188 int family; /* family of the socket */ 189 190 family = so->so_proto->pr_domain->dom_family; 191 192 if (req == PRU_CONTROL) { 193 switch (family) { 194 #ifdef INET 195 case PF_INET: 196 return (in_control(so, (long)m, (void *)nam, 197 (struct ifnet *)control, l)); 198 #endif 199 #ifdef INET6 200 case PF_INET6: 201 return (in6_control(so, (long)m, (void *)nam, 202 (struct ifnet *)control, l)); 203 #endif 204 default: 205 return EAFNOSUPPORT; 206 } 207 } 208 209 s = splsoftnet(); 210 211 if (req == PRU_PURGEIF) { 212 switch (family) { 213 #ifdef INET 214 case PF_INET: 215 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 216 in_purgeif((struct ifnet *)control); 217 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 218 break; 219 #endif 220 #ifdef INET6 221 case PF_INET6: 222 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 223 in6_purgeif((struct ifnet *)control); 224 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 225 break; 226 #endif 227 default: 228 splx(s); 229 return (EAFNOSUPPORT); 230 } 231 splx(s); 232 return (0); 233 } 234 235 switch (family) { 236 #ifdef INET 237 case PF_INET: 238 inp = sotoinpcb(so); 239 #ifdef INET6 240 in6p = NULL; 241 #endif 242 break; 243 #endif 244 #ifdef INET6 245 case PF_INET6: 246 inp = NULL; 247 in6p = sotoin6pcb(so); 248 break; 249 #endif 250 default: 251 splx(s); 252 return EAFNOSUPPORT; 253 } 254 255 #ifdef DIAGNOSTIC 256 #ifdef INET6 257 if (inp && in6p) 258 panic("tcp_usrreq: both inp and in6p set to non-NULL"); 259 #endif 260 if (req != PRU_SEND && req != PRU_SENDOOB && control) 261 panic("tcp_usrreq: unexpected control mbuf"); 262 #endif 263 /* 264 * When a TCP is attached to a socket, then there will be 265 * a (struct inpcb) pointed at by the socket, and this 266 * structure will point at a subsidary (struct tcpcb). 267 */ 268 #ifndef INET6 269 if (inp == 0 && req != PRU_ATTACH) 270 #else 271 if ((inp == 0 && in6p == 0) && req != PRU_ATTACH) 272 #endif 273 { 274 error = EINVAL; 275 goto release; 276 } 277 #ifdef INET 278 if (inp) { 279 tp = intotcpcb(inp); 280 /* WHAT IF TP IS 0? */ 281 #ifdef KPROF 282 tcp_acounts[tp->t_state][req]++; 283 #endif 284 #ifdef TCP_DEBUG 285 ostate = tp->t_state; 286 #endif 287 } 288 #endif 289 #ifdef INET6 290 if (in6p) { 291 tp = in6totcpcb(in6p); 292 /* WHAT IF TP IS 0? */ 293 #ifdef KPROF 294 tcp_acounts[tp->t_state][req]++; 295 #endif 296 #ifdef TCP_DEBUG 297 ostate = tp->t_state; 298 #endif 299 } 300 #endif 301 302 switch (req) { 303 304 /* 305 * TCP attaches to socket via PRU_ATTACH, reserving space, 306 * and an internet control block. 307 */ 308 case PRU_ATTACH: 309 #ifndef INET6 310 if (inp != 0) 311 #else 312 if (inp != 0 || in6p != 0) 313 #endif 314 { 315 error = EISCONN; 316 break; 317 } 318 error = tcp_attach(so); 319 if (error) 320 break; 321 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 322 so->so_linger = TCP_LINGERTIME; 323 tp = sototcpcb(so); 324 break; 325 326 /* 327 * PRU_DETACH detaches the TCP protocol from the socket. 328 */ 329 case PRU_DETACH: 330 tp = tcp_disconnect(tp); 331 break; 332 333 /* 334 * Give the socket an address. 335 */ 336 case PRU_BIND: 337 switch (family) { 338 #ifdef INET 339 case PF_INET: 340 error = in_pcbbind(inp, nam, l); 341 break; 342 #endif 343 #ifdef INET6 344 case PF_INET6: 345 error = in6_pcbbind(in6p, nam, l); 346 if (!error) { 347 /* mapped addr case */ 348 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 349 tp->t_family = AF_INET; 350 else 351 tp->t_family = AF_INET6; 352 } 353 break; 354 #endif 355 } 356 break; 357 358 /* 359 * Prepare to accept connections. 360 */ 361 case PRU_LISTEN: 362 #ifdef INET 363 if (inp && inp->inp_lport == 0) { 364 error = in_pcbbind(inp, (struct mbuf *)0, 365 (struct lwp *)0); 366 if (error) 367 break; 368 } 369 #endif 370 #ifdef INET6 371 if (in6p && in6p->in6p_lport == 0) { 372 error = in6_pcbbind(in6p, (struct mbuf *)0, 373 (struct lwp *)0); 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, (struct mbuf *)0, 393 (struct lwp *)0); 394 if (error) 395 break; 396 } 397 error = in_pcbconnect(inp, nam, l); 398 } 399 #endif 400 #ifdef INET6 401 if (in6p) { 402 if (in6p->in6p_lport == 0) { 403 error = in6_pcbbind(in6p, (struct mbuf *)0, 404 (struct lwp *)0); 405 if (error) 406 break; 407 } 408 error = in6_pcbconnect(in6p, nam, l); 409 if (!error) { 410 /* mapped addr case */ 411 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 412 tp->t_family = AF_INET; 413 else 414 tp->t_family = AF_INET6; 415 } 416 } 417 #endif 418 if (error) 419 break; 420 tp->t_template = tcp_template(tp); 421 if (tp->t_template == 0) { 422 #ifdef INET 423 if (inp) 424 in_pcbdisconnect(inp); 425 #endif 426 #ifdef INET6 427 if (in6p) 428 in6_pcbdisconnect(in6p); 429 #endif 430 error = ENOBUFS; 431 break; 432 } 433 /* 434 * Compute window scaling to request. 435 * XXX: This should be moved to tcp_output(). 436 */ 437 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 438 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 439 tp->request_r_scale++; 440 soisconnecting(so); 441 tcpstat.tcps_connattempt++; 442 tp->t_state = TCPS_SYN_SENT; 443 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 444 tp->iss = tcp_new_iss(tp, 0); 445 tcp_sendseqinit(tp); 446 error = tcp_output(tp); 447 break; 448 449 /* 450 * Create a TCP connection between two sockets. 451 */ 452 case PRU_CONNECT2: 453 error = EOPNOTSUPP; 454 break; 455 456 /* 457 * Initiate disconnect from peer. 458 * If connection never passed embryonic stage, just drop; 459 * else if don't need to let data drain, then can just drop anyways, 460 * else have to begin TCP shutdown process: mark socket disconnecting, 461 * drain unread data, state switch to reflect user close, and 462 * send segment (e.g. FIN) to peer. Socket will be really disconnected 463 * when peer sends FIN and acks ours. 464 * 465 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 466 */ 467 case PRU_DISCONNECT: 468 tp = tcp_disconnect(tp); 469 break; 470 471 /* 472 * Accept a connection. Essentially all the work is 473 * done at higher levels; just return the address 474 * of the peer, storing through addr. 475 */ 476 case PRU_ACCEPT: 477 #ifdef INET 478 if (inp) 479 in_setpeeraddr(inp, nam); 480 #endif 481 #ifdef INET6 482 if (in6p) 483 in6_setpeeraddr(in6p, nam); 484 #endif 485 break; 486 487 /* 488 * Mark the connection as being incapable of further output. 489 */ 490 case PRU_SHUTDOWN: 491 socantsendmore(so); 492 tp = tcp_usrclosed(tp); 493 if (tp) 494 error = tcp_output(tp); 495 break; 496 497 /* 498 * After a receive, possibly send window update to peer. 499 */ 500 case PRU_RCVD: 501 /* 502 * soreceive() calls this function when a user receives 503 * ancillary data on a listening socket. We don't call 504 * tcp_output in such a case, since there is no header 505 * template for a listening socket and hence the kernel 506 * will panic. 507 */ 508 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 509 (void) tcp_output(tp); 510 break; 511 512 /* 513 * Do a send by putting data in output queue and updating urgent 514 * marker if URG set. Possibly send more data. 515 */ 516 case PRU_SEND: 517 if (control && control->m_len) { 518 m_freem(control); 519 m_freem(m); 520 error = EINVAL; 521 break; 522 } 523 sbappendstream(&so->so_snd, m); 524 error = tcp_output(tp); 525 break; 526 527 /* 528 * Abort the TCP. 529 */ 530 case PRU_ABORT: 531 tp = tcp_drop(tp, ECONNABORTED); 532 break; 533 534 case PRU_SENSE: 535 /* 536 * stat: don't bother with a blocksize. 537 */ 538 splx(s); 539 return (0); 540 541 case PRU_RCVOOB: 542 if (control && control->m_len) { 543 m_freem(control); 544 m_freem(m); 545 error = EINVAL; 546 break; 547 } 548 if ((so->so_oobmark == 0 && 549 (so->so_state & SS_RCVATMARK) == 0) || 550 so->so_options & SO_OOBINLINE || 551 tp->t_oobflags & TCPOOB_HADDATA) { 552 error = EINVAL; 553 break; 554 } 555 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 556 error = EWOULDBLOCK; 557 break; 558 } 559 m->m_len = 1; 560 *mtod(m, char *) = tp->t_iobc; 561 if (((long)nam & MSG_PEEK) == 0) 562 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 563 break; 564 565 case PRU_SENDOOB: 566 if (sbspace(&so->so_snd) < -512) { 567 m_freem(m); 568 error = ENOBUFS; 569 break; 570 } 571 /* 572 * According to RFC961 (Assigned Protocols), 573 * the urgent pointer points to the last octet 574 * of urgent data. We continue, however, 575 * to consider it to indicate the first octet 576 * of data past the urgent section. 577 * Otherwise, snd_up should be one lower. 578 */ 579 sbappendstream(&so->so_snd, m); 580 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 581 tp->t_force = 1; 582 error = tcp_output(tp); 583 tp->t_force = 0; 584 break; 585 586 case PRU_SOCKADDR: 587 #ifdef INET 588 if (inp) 589 in_setsockaddr(inp, nam); 590 #endif 591 #ifdef INET6 592 if (in6p) 593 in6_setsockaddr(in6p, nam); 594 #endif 595 break; 596 597 case PRU_PEERADDR: 598 #ifdef INET 599 if (inp) 600 in_setpeeraddr(inp, nam); 601 #endif 602 #ifdef INET6 603 if (in6p) 604 in6_setpeeraddr(in6p, nam); 605 #endif 606 break; 607 608 default: 609 panic("tcp_usrreq"); 610 } 611 #ifdef TCP_DEBUG 612 if (tp && (so->so_options & SO_DEBUG)) 613 tcp_trace(TA_USER, ostate, tp, NULL, req); 614 #endif 615 616 release: 617 splx(s); 618 return (error); 619 } 620 621 static void 622 change_keepalive(struct socket *so, struct tcpcb *tp) 623 { 624 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 625 TCP_TIMER_DISARM(tp, TCPT_KEEP); 626 TCP_TIMER_DISARM(tp, TCPT_2MSL); 627 628 if (tp->t_state == TCPS_SYN_RECEIVED || 629 tp->t_state == TCPS_SYN_SENT) { 630 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 631 } else if (so->so_options & SO_KEEPALIVE && 632 tp->t_state <= TCPS_CLOSE_WAIT) { 633 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 634 } else { 635 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 636 } 637 638 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 639 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 640 } 641 642 643 int 644 tcp_ctloutput(int op, struct socket *so, int level, int optname, 645 struct mbuf **mp) 646 { 647 int error = 0, s; 648 struct inpcb *inp; 649 #ifdef INET6 650 struct in6pcb *in6p; 651 #endif 652 struct tcpcb *tp; 653 struct mbuf *m; 654 int i; 655 u_int ui; 656 int family; /* family of the socket */ 657 658 family = so->so_proto->pr_domain->dom_family; 659 660 s = splsoftnet(); 661 switch (family) { 662 #ifdef INET 663 case PF_INET: 664 inp = sotoinpcb(so); 665 #ifdef INET6 666 in6p = NULL; 667 #endif 668 break; 669 #endif 670 #ifdef INET6 671 case PF_INET6: 672 inp = NULL; 673 in6p = sotoin6pcb(so); 674 break; 675 #endif 676 default: 677 splx(s); 678 panic("%s: af %d", __func__, family); 679 } 680 #ifndef INET6 681 if (inp == NULL) 682 #else 683 if (inp == NULL && in6p == NULL) 684 #endif 685 { 686 splx(s); 687 if (op == PRCO_SETOPT && *mp) 688 (void) m_free(*mp); 689 return (ECONNRESET); 690 } 691 if (level != IPPROTO_TCP) { 692 switch (family) { 693 #ifdef INET 694 case PF_INET: 695 error = ip_ctloutput(op, so, level, optname, mp); 696 break; 697 #endif 698 #ifdef INET6 699 case PF_INET6: 700 error = ip6_ctloutput(op, so, level, optname, mp); 701 break; 702 #endif 703 } 704 splx(s); 705 return (error); 706 } 707 if (inp) 708 tp = intotcpcb(inp); 709 #ifdef INET6 710 else if (in6p) 711 tp = in6totcpcb(in6p); 712 #endif 713 else 714 tp = NULL; 715 716 switch (op) { 717 718 case PRCO_SETOPT: 719 m = *mp; 720 switch (optname) { 721 722 #ifdef TCP_SIGNATURE 723 case TCP_MD5SIG: 724 if (m == NULL || m->m_len != sizeof(int)) 725 error = EINVAL; 726 if (error) 727 break; 728 if (*mtod(m, int *) > 0) 729 tp->t_flags |= TF_SIGNATURE; 730 else 731 tp->t_flags &= ~TF_SIGNATURE; 732 break; 733 #endif /* TCP_SIGNATURE */ 734 735 case TCP_NODELAY: 736 if (m == NULL || m->m_len != sizeof(int)) 737 error = EINVAL; 738 else if (*mtod(m, int *)) 739 tp->t_flags |= TF_NODELAY; 740 else 741 tp->t_flags &= ~TF_NODELAY; 742 break; 743 744 case TCP_MAXSEG: 745 if (m && m->m_len == sizeof(int) && 746 (i = *mtod(m, int *)) > 0 && 747 i <= tp->t_peermss) 748 tp->t_peermss = i; /* limit on send size */ 749 else 750 error = EINVAL; 751 break; 752 #ifdef notyet 753 case TCP_CONGCTL: 754 if (m == NULL) 755 error = EINVAL; 756 error = tcp_congctl_select(tp, mtod(m, char *)); 757 #endif 758 break; 759 760 case TCP_KEEPIDLE: 761 if (m && m->m_len == sizeof(u_int) && 762 (ui = *mtod(m, u_int *)) > 0) { 763 tp->t_keepidle = ui; 764 change_keepalive(so, tp); 765 } else 766 error = EINVAL; 767 break; 768 769 case TCP_KEEPINTVL: 770 if (m && m->m_len == sizeof(u_int) && 771 (ui = *mtod(m, u_int *)) > 0) { 772 tp->t_keepintvl = ui; 773 change_keepalive(so, tp); 774 } else 775 error = EINVAL; 776 break; 777 778 case TCP_KEEPCNT: 779 if (m && m->m_len == sizeof(u_int) && 780 (ui = *mtod(m, u_int *)) > 0) { 781 tp->t_keepcnt = ui; 782 change_keepalive(so, tp); 783 } else 784 error = EINVAL; 785 break; 786 787 case TCP_KEEPINIT: 788 if (m && m->m_len == sizeof(u_int) && 789 (ui = *mtod(m, u_int *)) > 0) { 790 tp->t_keepinit = ui; 791 change_keepalive(so, tp); 792 } else 793 error = EINVAL; 794 break; 795 796 default: 797 error = ENOPROTOOPT; 798 break; 799 } 800 if (m) 801 (void) m_free(m); 802 break; 803 804 case PRCO_GETOPT: 805 *mp = m = m_intopt(so, 0); 806 807 switch (optname) { 808 #ifdef TCP_SIGNATURE 809 case TCP_MD5SIG: 810 *mtod(m, int *) = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 811 break; 812 #endif 813 case TCP_NODELAY: 814 *mtod(m, int *) = tp->t_flags & TF_NODELAY; 815 break; 816 case TCP_MAXSEG: 817 *mtod(m, int *) = tp->t_peermss; 818 break; 819 #ifdef notyet 820 case TCP_CONGCTL: 821 break; 822 #endif 823 default: 824 error = ENOPROTOOPT; 825 break; 826 } 827 break; 828 } 829 splx(s); 830 return (error); 831 } 832 833 #ifndef TCP_SENDSPACE 834 #define TCP_SENDSPACE 1024*32 835 #endif 836 int tcp_sendspace = TCP_SENDSPACE; 837 #ifndef TCP_RECVSPACE 838 #define TCP_RECVSPACE 1024*32 839 #endif 840 int tcp_recvspace = TCP_RECVSPACE; 841 842 /* 843 * Attach TCP protocol to socket, allocating 844 * internet protocol control block, tcp control block, 845 * bufer space, and entering LISTEN state if to accept connections. 846 */ 847 int 848 tcp_attach(struct socket *so) 849 { 850 struct tcpcb *tp; 851 struct inpcb *inp; 852 #ifdef INET6 853 struct in6pcb *in6p; 854 #endif 855 int error; 856 int family; /* family of the socket */ 857 858 family = so->so_proto->pr_domain->dom_family; 859 860 #ifdef MBUFTRACE 861 so->so_mowner = &tcp_sock_mowner; 862 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 863 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 864 #endif 865 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 866 error = soreserve(so, tcp_sendspace, tcp_recvspace); 867 if (error) 868 return (error); 869 } 870 871 so->so_rcv.sb_flags |= SB_AUTOSIZE; 872 so->so_snd.sb_flags |= SB_AUTOSIZE; 873 874 switch (family) { 875 #ifdef INET 876 case PF_INET: 877 error = in_pcballoc(so, &tcbtable); 878 if (error) 879 return (error); 880 inp = sotoinpcb(so); 881 #ifdef INET6 882 in6p = NULL; 883 #endif 884 break; 885 #endif 886 #ifdef INET6 887 case PF_INET6: 888 error = in6_pcballoc(so, &tcbtable); 889 if (error) 890 return (error); 891 inp = NULL; 892 in6p = sotoin6pcb(so); 893 break; 894 #endif 895 default: 896 return EAFNOSUPPORT; 897 } 898 if (inp) 899 tp = tcp_newtcpcb(family, (void *)inp); 900 #ifdef INET6 901 else if (in6p) 902 tp = tcp_newtcpcb(family, (void *)in6p); 903 #endif 904 else 905 tp = NULL; 906 907 if (tp == 0) { 908 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 909 910 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 911 #ifdef INET 912 if (inp) 913 in_pcbdetach(inp); 914 #endif 915 #ifdef INET6 916 if (in6p) 917 in6_pcbdetach(in6p); 918 #endif 919 so->so_state |= nofd; 920 return (ENOBUFS); 921 } 922 tp->t_state = TCPS_CLOSED; 923 return (0); 924 } 925 926 /* 927 * Initiate (or continue) disconnect. 928 * If embryonic state, just send reset (once). 929 * If in ``let data drain'' option and linger null, just drop. 930 * Otherwise (hard), mark socket disconnecting and drop 931 * current input data; switch states based on user close, and 932 * send segment to peer (with FIN). 933 */ 934 struct tcpcb * 935 tcp_disconnect(struct tcpcb *tp) 936 { 937 struct socket *so; 938 939 if (tp->t_inpcb) 940 so = tp->t_inpcb->inp_socket; 941 #ifdef INET6 942 else if (tp->t_in6pcb) 943 so = tp->t_in6pcb->in6p_socket; 944 #endif 945 else 946 so = NULL; 947 948 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 949 tp = tcp_close(tp); 950 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 951 tp = tcp_drop(tp, 0); 952 else { 953 soisdisconnecting(so); 954 sbflush(&so->so_rcv); 955 tp = tcp_usrclosed(tp); 956 if (tp) 957 (void) tcp_output(tp); 958 } 959 return (tp); 960 } 961 962 /* 963 * User issued close, and wish to trail through shutdown states: 964 * if never received SYN, just forget it. If got a SYN from peer, 965 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 966 * If already got a FIN from peer, then almost done; go to LAST_ACK 967 * state. In all other cases, have already sent FIN to peer (e.g. 968 * after PRU_SHUTDOWN), and just have to play tedious game waiting 969 * for peer to send FIN or not respond to keep-alives, etc. 970 * We can let the user exit from the close as soon as the FIN is acked. 971 */ 972 struct tcpcb * 973 tcp_usrclosed(struct tcpcb *tp) 974 { 975 976 switch (tp->t_state) { 977 978 case TCPS_CLOSED: 979 case TCPS_LISTEN: 980 case TCPS_SYN_SENT: 981 tp->t_state = TCPS_CLOSED; 982 tp = tcp_close(tp); 983 break; 984 985 case TCPS_SYN_RECEIVED: 986 case TCPS_ESTABLISHED: 987 tp->t_state = TCPS_FIN_WAIT_1; 988 break; 989 990 case TCPS_CLOSE_WAIT: 991 tp->t_state = TCPS_LAST_ACK; 992 break; 993 } 994 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 995 struct socket *so; 996 if (tp->t_inpcb) 997 so = tp->t_inpcb->inp_socket; 998 #ifdef INET6 999 else if (tp->t_in6pcb) 1000 so = tp->t_in6pcb->in6p_socket; 1001 #endif 1002 else 1003 so = NULL; 1004 if (so) 1005 soisdisconnected(so); 1006 /* 1007 * If we are in FIN_WAIT_2, we arrived here because the 1008 * application did a shutdown of the send side. Like the 1009 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1010 * a full close, we start a timer to make sure sockets are 1011 * not left in FIN_WAIT_2 forever. 1012 */ 1013 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1014 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1015 } 1016 return (tp); 1017 } 1018 1019 /* 1020 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1021 * than 32. 1022 */ 1023 static int 1024 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1025 { 1026 int error, mssdflt; 1027 struct sysctlnode node; 1028 1029 mssdflt = tcp_mssdflt; 1030 node = *rnode; 1031 node.sysctl_data = &mssdflt; 1032 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1033 if (error || newp == NULL) 1034 return (error); 1035 1036 if (mssdflt < 32) 1037 return (EINVAL); 1038 tcp_mssdflt = mssdflt; 1039 1040 return (0); 1041 } 1042 1043 /* 1044 * sysctl helper routine for setting port related values under 1045 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1046 * additional checks for each type. this code has placed in 1047 * tcp_input.c since INET and INET6 both use the same tcp code. 1048 * 1049 * this helper is not static so that both inet and inet6 can use it. 1050 */ 1051 int 1052 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1053 { 1054 int error, tmp; 1055 int apmin, apmax; 1056 #ifndef IPNOPRIVPORTS 1057 int lpmin, lpmax; 1058 #endif /* IPNOPRIVPORTS */ 1059 struct sysctlnode node; 1060 1061 if (namelen != 0) 1062 return (EINVAL); 1063 1064 switch (name[-3]) { 1065 #ifdef INET 1066 case PF_INET: 1067 apmin = anonportmin; 1068 apmax = anonportmax; 1069 #ifndef IPNOPRIVPORTS 1070 lpmin = lowportmin; 1071 lpmax = lowportmax; 1072 #endif /* IPNOPRIVPORTS */ 1073 break; 1074 #endif /* INET */ 1075 #ifdef INET6 1076 case PF_INET6: 1077 apmin = ip6_anonportmin; 1078 apmax = ip6_anonportmax; 1079 #ifndef IPNOPRIVPORTS 1080 lpmin = ip6_lowportmin; 1081 lpmax = ip6_lowportmax; 1082 #endif /* IPNOPRIVPORTS */ 1083 break; 1084 #endif /* INET6 */ 1085 default: 1086 return (EINVAL); 1087 } 1088 1089 /* 1090 * insert temporary copy into node, perform lookup on 1091 * temporary, then restore pointer 1092 */ 1093 node = *rnode; 1094 tmp = *(int*)rnode->sysctl_data; 1095 node.sysctl_data = &tmp; 1096 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1097 if (error || newp == NULL) 1098 return (error); 1099 1100 /* 1101 * simple port range check 1102 */ 1103 if (tmp < 0 || tmp > 65535) 1104 return (EINVAL); 1105 1106 /* 1107 * per-node range checks 1108 */ 1109 switch (rnode->sysctl_num) { 1110 case IPCTL_ANONPORTMIN: 1111 if (tmp >= apmax) 1112 return (EINVAL); 1113 #ifndef IPNOPRIVPORTS 1114 if (tmp < IPPORT_RESERVED) 1115 return (EINVAL); 1116 #endif /* IPNOPRIVPORTS */ 1117 break; 1118 1119 case IPCTL_ANONPORTMAX: 1120 if (apmin >= tmp) 1121 return (EINVAL); 1122 #ifndef IPNOPRIVPORTS 1123 if (tmp < IPPORT_RESERVED) 1124 return (EINVAL); 1125 #endif /* IPNOPRIVPORTS */ 1126 break; 1127 1128 #ifndef IPNOPRIVPORTS 1129 case IPCTL_LOWPORTMIN: 1130 if (tmp >= lpmax || 1131 tmp > IPPORT_RESERVEDMAX || 1132 tmp < IPPORT_RESERVEDMIN) 1133 return (EINVAL); 1134 break; 1135 1136 case IPCTL_LOWPORTMAX: 1137 if (lpmin >= tmp || 1138 tmp > IPPORT_RESERVEDMAX || 1139 tmp < IPPORT_RESERVEDMIN) 1140 return (EINVAL); 1141 break; 1142 #endif /* IPNOPRIVPORTS */ 1143 1144 default: 1145 return (EINVAL); 1146 } 1147 1148 *(int*)rnode->sysctl_data = tmp; 1149 1150 return (0); 1151 } 1152 1153 /* 1154 * The superuser can drop any connection. Normal users can only drop 1155 * their own connections. 1156 */ 1157 static inline int 1158 check_sockuid(struct socket *sockp, kauth_cred_t cred) 1159 { 1160 uid_t sockuid; 1161 1162 sockuid = sockp->so_uidinfo->ui_uid; 1163 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0 || 1164 sockuid == kauth_cred_getuid(cred) || 1165 sockuid == kauth_cred_geteuid(cred)) 1166 return 0; 1167 return EACCES; 1168 } 1169 1170 static inline int 1171 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1172 { 1173 size_t sz; 1174 int error; 1175 uid_t uid; 1176 1177 uid = sockp->so_uidinfo->ui_uid; 1178 if (oldp) { 1179 sz = MIN(sizeof(uid), *oldlenp); 1180 error = copyout(&uid, oldp, sz); 1181 if (error) 1182 return error; 1183 } 1184 *oldlenp = sizeof(uid); 1185 return 0; 1186 } 1187 1188 static inline int 1189 inet4_ident_core(struct in_addr raddr, u_int rport, 1190 struct in_addr laddr, u_int lport, 1191 void *oldp, size_t *oldlenp, 1192 struct lwp *l, int dodrop) 1193 { 1194 struct inpcb *inp; 1195 struct socket *sockp; 1196 1197 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport); 1198 1199 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1200 return ESRCH; 1201 1202 if (dodrop) { 1203 struct tcpcb *tp; 1204 1205 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1206 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1207 return ESRCH; 1208 1209 if (check_sockuid(inp->inp_socket, l->l_cred) != 0) 1210 return EACCES; 1211 1212 (void)tcp_drop(tp, ECONNABORTED); 1213 return 0; 1214 } 1215 else 1216 return copyout_uid(sockp, oldp, oldlenp); 1217 } 1218 1219 #ifdef INET6 1220 static inline int 1221 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1222 struct in6_addr *laddr, u_int lport, 1223 void *oldp, size_t *oldlenp, 1224 struct lwp *l, int dodrop) 1225 { 1226 struct in6pcb *in6p; 1227 struct socket *sockp; 1228 1229 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1230 1231 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1232 return ESRCH; 1233 1234 if (dodrop) { 1235 struct tcpcb *tp; 1236 1237 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1238 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1239 return ESRCH; 1240 1241 if (check_sockuid(in6p->in6p_socket, l->l_cred) != 0) 1242 return EACCES; 1243 1244 (void)tcp_drop(tp, ECONNABORTED); 1245 return 0; 1246 } 1247 else 1248 return copyout_uid(sockp, oldp, oldlenp); 1249 } 1250 #endif 1251 1252 /* 1253 * sysctl helper routine for the net.inet.tcp.drop and 1254 * net.inet6.tcp6.drop nodes. 1255 */ 1256 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1257 1258 /* 1259 * sysctl helper routine for the net.inet.tcp.ident and 1260 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1261 * old way of looking up the ident information for ipv4 which involves 1262 * stuffing the port/addr pairs into the mib lookup. 1263 */ 1264 static int 1265 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1266 { 1267 #ifdef INET 1268 struct sockaddr_in *si4[2]; 1269 #endif /* INET */ 1270 #ifdef INET6 1271 struct sockaddr_in6 *si6[2]; 1272 #endif /* INET6 */ 1273 struct sockaddr_storage sa[2]; 1274 int error, pf, dodrop, s; 1275 1276 dodrop = name[-1] == TCPCTL_DROP; 1277 if (dodrop) { 1278 if (oldp != NULL || *oldlenp != 0) 1279 return EINVAL; 1280 if (newp == NULL) 1281 return EPERM; 1282 if (newlen < sizeof(sa)) 1283 return ENOMEM; 1284 } 1285 if (namelen != 4 && namelen != 0) 1286 return EINVAL; 1287 if (name[-2] != IPPROTO_TCP) 1288 return EINVAL; 1289 pf = name[-3]; 1290 1291 /* old style lookup, ipv4 only */ 1292 if (namelen == 4) { 1293 #ifdef INET 1294 struct in_addr laddr, raddr; 1295 u_int lport, rport; 1296 1297 if (pf != PF_INET) 1298 return EPROTONOSUPPORT; 1299 raddr.s_addr = (uint32_t)name[0]; 1300 rport = (u_int)name[1]; 1301 laddr.s_addr = (uint32_t)name[2]; 1302 lport = (u_int)name[3]; 1303 1304 s = splsoftnet(); 1305 error = inet4_ident_core(raddr, rport, laddr, lport, 1306 oldp, oldlenp, l, dodrop); 1307 splx(s); 1308 return error; 1309 #else /* INET */ 1310 return EINVAL; 1311 #endif /* INET */ 1312 } 1313 1314 if (newp == NULL || newlen != sizeof(sa)) 1315 return EINVAL; 1316 error = copyin(newp, &sa, newlen); 1317 if (error) 1318 return error; 1319 1320 /* 1321 * requested families must match 1322 */ 1323 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1324 return EINVAL; 1325 1326 switch (pf) { 1327 #ifdef INET6 1328 case PF_INET6: 1329 si6[0] = (struct sockaddr_in6*)&sa[0]; 1330 si6[1] = (struct sockaddr_in6*)&sa[1]; 1331 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1332 si6[1]->sin6_len != sizeof(*si6[1])) 1333 return EINVAL; 1334 1335 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1336 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1337 error = sa6_embedscope(si6[0], ip6_use_defzone); 1338 if (error) 1339 return error; 1340 error = sa6_embedscope(si6[1], ip6_use_defzone); 1341 if (error) 1342 return error; 1343 1344 s = splsoftnet(); 1345 error = inet6_ident_core(&si6[0]->sin6_addr, 1346 si6[0]->sin6_port, &si6[1]->sin6_addr, 1347 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1348 splx(s); 1349 return error; 1350 } 1351 1352 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1353 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1354 return EINVAL; 1355 1356 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1357 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1358 /*FALLTHROUGH*/ 1359 #endif /* INET6 */ 1360 #ifdef INET 1361 case PF_INET: 1362 si4[0] = (struct sockaddr_in*)&sa[0]; 1363 si4[1] = (struct sockaddr_in*)&sa[1]; 1364 if (si4[0]->sin_len != sizeof(*si4[0]) || 1365 si4[0]->sin_len != sizeof(*si4[1])) 1366 return EINVAL; 1367 1368 s = splsoftnet(); 1369 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1370 si4[1]->sin_addr, si4[1]->sin_port, 1371 oldp, oldlenp, l, dodrop); 1372 splx(s); 1373 return error; 1374 #endif /* INET */ 1375 default: 1376 return EPROTONOSUPPORT; 1377 } 1378 } 1379 1380 /* 1381 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1382 * inet/inet6, as well as raw pcbs for each. specifically not 1383 * declared static so that raw sockets and udp/udp6 can use it as 1384 * well. 1385 */ 1386 int 1387 sysctl_inpcblist(SYSCTLFN_ARGS) 1388 { 1389 #ifdef INET 1390 struct sockaddr_in *in; 1391 const struct inpcb *inp; 1392 #endif 1393 #ifdef INET6 1394 struct sockaddr_in6 *in6; 1395 const struct in6pcb *in6p; 1396 #endif 1397 /* 1398 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1399 * struct inpcbtable pointer, so we have to discard const. :-/ 1400 */ 1401 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1402 const struct inpcb_hdr *inph; 1403 struct tcpcb *tp; 1404 struct kinfo_pcb pcb; 1405 char *dp; 1406 u_int op, arg; 1407 size_t len, needed, elem_size, out_size; 1408 int error, elem_count, pf, proto, pf2; 1409 1410 if (namelen != 4) 1411 return (EINVAL); 1412 1413 if (oldp != NULL) { 1414 len = *oldlenp; 1415 elem_size = name[2]; 1416 elem_count = name[3]; 1417 if (elem_size != sizeof(pcb)) 1418 return EINVAL; 1419 } else { 1420 len = 0; 1421 elem_count = INT_MAX; 1422 elem_size = sizeof(pcb); 1423 } 1424 error = 0; 1425 dp = oldp; 1426 op = name[0]; 1427 arg = name[1]; 1428 out_size = elem_size; 1429 needed = 0; 1430 1431 if (namelen == 1 && name[0] == CTL_QUERY) 1432 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1433 1434 if (name - oname != 4) 1435 return (EINVAL); 1436 1437 pf = oname[1]; 1438 proto = oname[2]; 1439 pf2 = (oldp != NULL) ? pf : 0; 1440 1441 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1442 #ifdef INET 1443 inp = (const struct inpcb *)inph; 1444 #endif 1445 #ifdef INET6 1446 in6p = (const struct in6pcb *)inph; 1447 #endif 1448 1449 if (inph->inph_af != pf) 1450 continue; 1451 1452 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1453 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1454 NULL) != 0) 1455 continue; 1456 1457 memset(&pcb, 0, sizeof(pcb)); 1458 1459 pcb.ki_family = pf; 1460 pcb.ki_type = proto; 1461 1462 switch (pf2) { 1463 case 0: 1464 /* just probing for size */ 1465 break; 1466 #ifdef INET 1467 case PF_INET: 1468 pcb.ki_family = inp->inp_socket->so_proto-> 1469 pr_domain->dom_family; 1470 pcb.ki_type = inp->inp_socket->so_proto-> 1471 pr_type; 1472 pcb.ki_protocol = inp->inp_socket->so_proto-> 1473 pr_protocol; 1474 pcb.ki_pflags = inp->inp_flags; 1475 1476 pcb.ki_sostate = inp->inp_socket->so_state; 1477 pcb.ki_prstate = inp->inp_state; 1478 if (proto == IPPROTO_TCP) { 1479 tp = intotcpcb(inp); 1480 pcb.ki_tstate = tp->t_state; 1481 pcb.ki_tflags = tp->t_flags; 1482 } 1483 1484 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1485 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1486 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1487 1488 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1489 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1490 1491 in = satosin(&pcb.ki_src); 1492 in->sin_len = sizeof(*in); 1493 in->sin_family = pf; 1494 in->sin_port = inp->inp_lport; 1495 in->sin_addr = inp->inp_laddr; 1496 if (pcb.ki_prstate >= INP_CONNECTED) { 1497 in = satosin(&pcb.ki_dst); 1498 in->sin_len = sizeof(*in); 1499 in->sin_family = pf; 1500 in->sin_port = inp->inp_fport; 1501 in->sin_addr = inp->inp_faddr; 1502 } 1503 break; 1504 #endif 1505 #ifdef INET6 1506 case PF_INET6: 1507 pcb.ki_family = in6p->in6p_socket->so_proto-> 1508 pr_domain->dom_family; 1509 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1510 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1511 pr_protocol; 1512 pcb.ki_pflags = in6p->in6p_flags; 1513 1514 pcb.ki_sostate = in6p->in6p_socket->so_state; 1515 pcb.ki_prstate = in6p->in6p_state; 1516 if (proto == IPPROTO_TCP) { 1517 tp = in6totcpcb(in6p); 1518 pcb.ki_tstate = tp->t_state; 1519 pcb.ki_tflags = tp->t_flags; 1520 } 1521 1522 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1523 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1524 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1525 1526 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1527 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1528 1529 in6 = satosin6(&pcb.ki_src); 1530 in6->sin6_len = sizeof(*in6); 1531 in6->sin6_family = pf; 1532 in6->sin6_port = in6p->in6p_lport; 1533 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1534 in6->sin6_addr = in6p->in6p_laddr; 1535 in6->sin6_scope_id = 0; /* XXX? */ 1536 1537 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1538 in6 = satosin6(&pcb.ki_dst); 1539 in6->sin6_len = sizeof(*in6); 1540 in6->sin6_family = pf; 1541 in6->sin6_port = in6p->in6p_fport; 1542 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1543 in6->sin6_addr = in6p->in6p_faddr; 1544 in6->sin6_scope_id = 0; /* XXX? */ 1545 } 1546 break; 1547 #endif 1548 } 1549 1550 if (len >= elem_size && elem_count > 0) { 1551 error = copyout(&pcb, dp, out_size); 1552 if (error) 1553 return (error); 1554 dp += elem_size; 1555 len -= elem_size; 1556 } 1557 if (elem_count > 0) { 1558 needed += elem_size; 1559 if (elem_count != INT_MAX) 1560 elem_count--; 1561 } 1562 } 1563 1564 *oldlenp = needed; 1565 if (oldp == NULL) 1566 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1567 1568 return (error); 1569 } 1570 1571 static int 1572 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1573 { 1574 struct sysctlnode node; 1575 int error, r; 1576 char newname[TCPCC_MAXLEN]; 1577 1578 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1579 1580 node = *rnode; 1581 node.sysctl_data = newname; 1582 node.sysctl_size = sizeof(newname); 1583 1584 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1585 1586 if (error || 1587 newp == NULL || 1588 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1589 return error; 1590 1591 if ((r = tcp_congctl_select(NULL, newname))) 1592 return r; 1593 1594 return error; 1595 } 1596 1597 static int 1598 sysctl_tcp_keep(SYSCTLFN_ARGS) 1599 { 1600 int error; 1601 u_int tmp; 1602 struct sysctlnode node; 1603 1604 node = *rnode; 1605 tmp = *(u_int *)rnode->sysctl_data; 1606 node.sysctl_data = &tmp; 1607 1608 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1609 if (error || newp == NULL) 1610 return error; 1611 1612 *(u_int *)rnode->sysctl_data = tmp; 1613 tcp_tcpcb_template(); /* update the template */ 1614 return 0; 1615 } 1616 1617 1618 /* 1619 * this (second stage) setup routine is a replacement for tcp_sysctl() 1620 * (which is currently used for ipv4 and ipv6) 1621 */ 1622 static void 1623 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1624 const char *tcpname) 1625 { 1626 const struct sysctlnode *sack_node; 1627 const struct sysctlnode *abc_node; 1628 const struct sysctlnode *ecn_node; 1629 const struct sysctlnode *congctl_node; 1630 #ifdef TCP_DEBUG 1631 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1632 extern int tcp_debx; 1633 #endif 1634 1635 sysctl_createv(clog, 0, NULL, NULL, 1636 CTLFLAG_PERMANENT, 1637 CTLTYPE_NODE, "net", NULL, 1638 NULL, 0, NULL, 0, 1639 CTL_NET, CTL_EOL); 1640 sysctl_createv(clog, 0, NULL, NULL, 1641 CTLFLAG_PERMANENT, 1642 CTLTYPE_NODE, pfname, NULL, 1643 NULL, 0, NULL, 0, 1644 CTL_NET, pf, CTL_EOL); 1645 sysctl_createv(clog, 0, NULL, NULL, 1646 CTLFLAG_PERMANENT, 1647 CTLTYPE_NODE, tcpname, 1648 SYSCTL_DESCR("TCP related settings"), 1649 NULL, 0, NULL, 0, 1650 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1651 1652 sysctl_createv(clog, 0, NULL, NULL, 1653 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1654 CTLTYPE_INT, "rfc1323", 1655 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1656 NULL, 0, &tcp_do_rfc1323, 0, 1657 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1658 sysctl_createv(clog, 0, NULL, NULL, 1659 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1660 CTLTYPE_INT, "sendspace", 1661 SYSCTL_DESCR("Default TCP send buffer size"), 1662 NULL, 0, &tcp_sendspace, 0, 1663 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1664 sysctl_createv(clog, 0, NULL, NULL, 1665 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1666 CTLTYPE_INT, "recvspace", 1667 SYSCTL_DESCR("Default TCP receive buffer size"), 1668 NULL, 0, &tcp_recvspace, 0, 1669 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1670 sysctl_createv(clog, 0, NULL, NULL, 1671 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1672 CTLTYPE_INT, "mssdflt", 1673 SYSCTL_DESCR("Default maximum segment size"), 1674 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1675 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1676 sysctl_createv(clog, 0, NULL, NULL, 1677 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1678 CTLTYPE_INT, "minmss", 1679 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1680 NULL, 0, &tcp_minmss, 0, 1681 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1682 sysctl_createv(clog, 0, NULL, NULL, 1683 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1684 CTLTYPE_INT, "syn_cache_limit", 1685 SYSCTL_DESCR("Maximum number of entries in the TCP " 1686 "compressed state engine"), 1687 NULL, 0, &tcp_syn_cache_limit, 0, 1688 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1689 CTL_EOL); 1690 sysctl_createv(clog, 0, NULL, NULL, 1691 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1692 CTLTYPE_INT, "syn_bucket_limit", 1693 SYSCTL_DESCR("Maximum number of entries per hash " 1694 "bucket in the TCP compressed state " 1695 "engine"), 1696 NULL, 0, &tcp_syn_bucket_limit, 0, 1697 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1698 CTL_EOL); 1699 #if 0 /* obsoleted */ 1700 sysctl_createv(clog, 0, NULL, NULL, 1701 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1702 CTLTYPE_INT, "syn_cache_interval", 1703 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1704 NULL, 0, &tcp_syn_cache_interval, 0, 1705 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1706 CTL_EOL); 1707 #endif 1708 sysctl_createv(clog, 0, NULL, NULL, 1709 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1710 CTLTYPE_INT, "init_win", 1711 SYSCTL_DESCR("Initial TCP congestion window"), 1712 NULL, 0, &tcp_init_win, 0, 1713 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1714 sysctl_createv(clog, 0, NULL, NULL, 1715 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1716 CTLTYPE_INT, "mss_ifmtu", 1717 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1718 NULL, 0, &tcp_mss_ifmtu, 0, 1719 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1720 sysctl_createv(clog, 0, NULL, &sack_node, 1721 CTLFLAG_PERMANENT, 1722 CTLTYPE_NODE, "sack", 1723 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1724 NULL, 0, NULL, 0, 1725 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1726 1727 /* Congctl subtree */ 1728 sysctl_createv(clog, 0, NULL, &congctl_node, 1729 CTLFLAG_PERMANENT, 1730 CTLTYPE_NODE, "congctl", 1731 SYSCTL_DESCR("TCP Congestion Control"), 1732 NULL, 0, NULL, 0, 1733 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1734 sysctl_createv(clog, 0, &congctl_node, NULL, 1735 CTLFLAG_PERMANENT, 1736 CTLTYPE_STRING, "available", 1737 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1738 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1739 sysctl_createv(clog, 0, &congctl_node, NULL, 1740 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1741 CTLTYPE_STRING, "selected", 1742 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1743 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1744 CTL_CREATE, CTL_EOL); 1745 1746 sysctl_createv(clog, 0, NULL, NULL, 1747 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1748 CTLTYPE_INT, "win_scale", 1749 SYSCTL_DESCR("Use RFC1323 window scale options"), 1750 NULL, 0, &tcp_do_win_scale, 0, 1751 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1752 sysctl_createv(clog, 0, NULL, NULL, 1753 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1754 CTLTYPE_INT, "timestamps", 1755 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1756 NULL, 0, &tcp_do_timestamps, 0, 1757 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1758 sysctl_createv(clog, 0, NULL, NULL, 1759 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1760 CTLTYPE_INT, "compat_42", 1761 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1762 NULL, 0, &tcp_compat_42, 0, 1763 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1764 sysctl_createv(clog, 0, NULL, NULL, 1765 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1766 CTLTYPE_INT, "cwm", 1767 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1768 "Monitoring"), 1769 NULL, 0, &tcp_cwm, 0, 1770 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1771 sysctl_createv(clog, 0, NULL, NULL, 1772 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1773 CTLTYPE_INT, "cwm_burstsize", 1774 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1775 "burst count in packets"), 1776 NULL, 0, &tcp_cwm_burstsize, 0, 1777 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1778 CTL_EOL); 1779 sysctl_createv(clog, 0, NULL, NULL, 1780 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1781 CTLTYPE_INT, "ack_on_push", 1782 SYSCTL_DESCR("Immediately return ACK when PSH is " 1783 "received"), 1784 NULL, 0, &tcp_ack_on_push, 0, 1785 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1786 sysctl_createv(clog, 0, NULL, NULL, 1787 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1788 CTLTYPE_INT, "keepidle", 1789 SYSCTL_DESCR("Allowed connection idle ticks before a " 1790 "keepalive probe is sent"), 1791 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1792 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1793 sysctl_createv(clog, 0, NULL, NULL, 1794 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1795 CTLTYPE_INT, "keepintvl", 1796 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1797 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1798 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1799 sysctl_createv(clog, 0, NULL, NULL, 1800 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1801 CTLTYPE_INT, "keepcnt", 1802 SYSCTL_DESCR("Number of keepalive probes to send"), 1803 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1804 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1805 sysctl_createv(clog, 0, NULL, NULL, 1806 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1807 CTLTYPE_INT, "slowhz", 1808 SYSCTL_DESCR("Keepalive ticks per second"), 1809 NULL, PR_SLOWHZ, NULL, 0, 1810 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1811 sysctl_createv(clog, 0, NULL, NULL, 1812 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1813 CTLTYPE_INT, "log_refused", 1814 SYSCTL_DESCR("Log refused TCP connections"), 1815 NULL, 0, &tcp_log_refused, 0, 1816 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1817 #if 0 /* obsoleted */ 1818 sysctl_createv(clog, 0, NULL, NULL, 1819 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1820 CTLTYPE_INT, "rstratelimit", NULL, 1821 NULL, 0, &tcp_rst_ratelim, 0, 1822 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1823 #endif 1824 sysctl_createv(clog, 0, NULL, NULL, 1825 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1826 CTLTYPE_INT, "rstppslimit", 1827 SYSCTL_DESCR("Maximum number of RST packets to send " 1828 "per second"), 1829 NULL, 0, &tcp_rst_ppslim, 0, 1830 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1831 sysctl_createv(clog, 0, NULL, NULL, 1832 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1833 CTLTYPE_INT, "delack_ticks", 1834 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1835 NULL, 0, &tcp_delack_ticks, 0, 1836 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1837 sysctl_createv(clog, 0, NULL, NULL, 1838 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1839 CTLTYPE_INT, "init_win_local", 1840 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1841 NULL, 0, &tcp_init_win_local, 0, 1842 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1843 CTL_EOL); 1844 sysctl_createv(clog, 0, NULL, NULL, 1845 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1846 CTLTYPE_STRUCT, "ident", 1847 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1848 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1849 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1850 sysctl_createv(clog, 0, NULL, NULL, 1851 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1852 CTLTYPE_INT, "do_loopback_cksum", 1853 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1854 NULL, 0, &tcp_do_loopback_cksum, 0, 1855 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1856 CTL_EOL); 1857 sysctl_createv(clog, 0, NULL, NULL, 1858 CTLFLAG_PERMANENT, 1859 CTLTYPE_STRUCT, "pcblist", 1860 SYSCTL_DESCR("TCP protocol control block list"), 1861 sysctl_inpcblist, 0, &tcbtable, 0, 1862 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1863 CTL_EOL); 1864 sysctl_createv(clog, 0, NULL, NULL, 1865 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1866 CTLTYPE_INT, "keepinit", 1867 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1868 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1869 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1870 1871 /* TCP socket buffers auto-sizing nodes */ 1872 sysctl_createv(clog, 0, NULL, NULL, 1873 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1874 CTLTYPE_INT, "recvbuf_auto", 1875 SYSCTL_DESCR("Enable automatic receive " 1876 "buffer sizing (experimental)"), 1877 NULL, 0, &tcp_do_autorcvbuf, 0, 1878 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1879 sysctl_createv(clog, 0, NULL, NULL, 1880 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1881 CTLTYPE_INT, "recvbuf_inc", 1882 SYSCTL_DESCR("Incrementor step size of " 1883 "automatic receive buffer"), 1884 NULL, 0, &tcp_autorcvbuf_inc, 0, 1885 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1886 sysctl_createv(clog, 0, NULL, NULL, 1887 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1888 CTLTYPE_INT, "recvbuf_max", 1889 SYSCTL_DESCR("Max size of automatic receive buffer"), 1890 NULL, 0, &tcp_autorcvbuf_max, 0, 1891 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1892 1893 sysctl_createv(clog, 0, NULL, NULL, 1894 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1895 CTLTYPE_INT, "sendbuf_auto", 1896 SYSCTL_DESCR("Enable automatic send " 1897 "buffer sizing (experimental)"), 1898 NULL, 0, &tcp_do_autosndbuf, 0, 1899 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1900 sysctl_createv(clog, 0, NULL, NULL, 1901 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1902 CTLTYPE_INT, "sendbuf_inc", 1903 SYSCTL_DESCR("Incrementor step size of " 1904 "automatic send buffer"), 1905 NULL, 0, &tcp_autosndbuf_inc, 0, 1906 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1907 sysctl_createv(clog, 0, NULL, NULL, 1908 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1909 CTLTYPE_INT, "sendbuf_max", 1910 SYSCTL_DESCR("Max size of automatic send buffer"), 1911 NULL, 0, &tcp_autosndbuf_max, 0, 1912 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1913 1914 /* ECN subtree */ 1915 sysctl_createv(clog, 0, NULL, &ecn_node, 1916 CTLFLAG_PERMANENT, 1917 CTLTYPE_NODE, "ecn", 1918 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1919 NULL, 0, NULL, 0, 1920 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1921 sysctl_createv(clog, 0, &ecn_node, NULL, 1922 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1923 CTLTYPE_INT, "enable", 1924 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1925 "Notification"), 1926 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1927 sysctl_createv(clog, 0, &ecn_node, NULL, 1928 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1929 CTLTYPE_INT, "maxretries", 1930 SYSCTL_DESCR("Number of times to retry ECN setup " 1931 "before disabling ECN on the connection"), 1932 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1933 1934 /* SACK gets it's own little subtree. */ 1935 sysctl_createv(clog, 0, NULL, &sack_node, 1936 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1937 CTLTYPE_INT, "enable", 1938 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1939 NULL, 0, &tcp_do_sack, 0, 1940 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1941 sysctl_createv(clog, 0, NULL, &sack_node, 1942 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1943 CTLTYPE_INT, "maxholes", 1944 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1945 NULL, 0, &tcp_sack_tp_maxholes, 0, 1946 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1947 sysctl_createv(clog, 0, NULL, &sack_node, 1948 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1949 CTLTYPE_INT, "globalmaxholes", 1950 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1951 NULL, 0, &tcp_sack_globalmaxholes, 0, 1952 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1953 sysctl_createv(clog, 0, NULL, &sack_node, 1954 CTLFLAG_PERMANENT, 1955 CTLTYPE_INT, "globalholes", 1956 SYSCTL_DESCR("Global number of TCP SACK holes"), 1957 NULL, 0, &tcp_sack_globalholes, 0, 1958 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1959 1960 sysctl_createv(clog, 0, NULL, NULL, 1961 CTLFLAG_PERMANENT, 1962 CTLTYPE_STRUCT, "stats", 1963 SYSCTL_DESCR("TCP statistics"), 1964 NULL, 0, &tcpstat, sizeof(tcpstat), 1965 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1966 CTL_EOL); 1967 #ifdef TCP_DEBUG 1968 sysctl_createv(clog, 0, NULL, NULL, 1969 CTLFLAG_PERMANENT, 1970 CTLTYPE_STRUCT, "debug", 1971 SYSCTL_DESCR("TCP sockets debug information"), 1972 NULL, 0, &tcp_debug, sizeof(tcp_debug), 1973 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 1974 CTL_EOL); 1975 sysctl_createv(clog, 0, NULL, NULL, 1976 CTLFLAG_PERMANENT, 1977 CTLTYPE_INT, "debx", 1978 SYSCTL_DESCR("Number of TCP debug sockets messages"), 1979 NULL, 0, &tcp_debx, sizeof(tcp_debx), 1980 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 1981 CTL_EOL); 1982 #endif 1983 sysctl_createv(clog, 0, NULL, NULL, 1984 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1985 CTLTYPE_STRUCT, "drop", 1986 SYSCTL_DESCR("TCP drop connection"), 1987 sysctl_net_inet_tcp_drop, 0, NULL, 0, 1988 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 1989 #if NRND > 0 1990 sysctl_createv(clog, 0, NULL, NULL, 1991 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1992 CTLTYPE_INT, "iss_hash", 1993 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 1994 "hash computation"), 1995 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 1996 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1997 CTL_EOL); 1998 #endif 1999 2000 /* ABC subtree */ 2001 2002 sysctl_createv(clog, 0, NULL, &abc_node, 2003 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2004 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2005 NULL, 0, NULL, 0, 2006 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2007 sysctl_createv(clog, 0, &abc_node, NULL, 2008 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2009 CTLTYPE_INT, "enable", 2010 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2011 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2012 sysctl_createv(clog, 0, &abc_node, NULL, 2013 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2014 CTLTYPE_INT, "aggressive", 2015 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2016 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2017 } 2018 2019 /* 2020 * Sysctl for tcp variables. 2021 */ 2022 #ifdef INET 2023 SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup") 2024 { 2025 2026 sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp"); 2027 } 2028 #endif /* INET */ 2029 2030 #ifdef INET6 2031 SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup") 2032 { 2033 2034 sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6"); 2035 } 2036 #endif /* INET6 */ 2037
Indexes created Sun Sep 21 20:09:37 GMT 2025