tcp_usrreq.c revision 1.131.2.2
1 /* $NetBSD: tcp_usrreq.c,v 1.131.2.2 2007/08/20 21:28:02 ad 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 1.131.2.2 2007/08/20 21:28:02 ad 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 * and should be based on the actual MSS. 437 */ 438 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 439 (0x1 << tp->request_r_scale) < tcp_minmss) 440 tp->request_r_scale++; 441 soisconnecting(so); 442 tcpstat.tcps_connattempt++; 443 tp->t_state = TCPS_SYN_SENT; 444 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 445 tp->iss = tcp_new_iss(tp, 0); 446 tcp_sendseqinit(tp); 447 error = tcp_output(tp); 448 break; 449 450 /* 451 * Create a TCP connection between two sockets. 452 */ 453 case PRU_CONNECT2: 454 error = EOPNOTSUPP; 455 break; 456 457 /* 458 * Initiate disconnect from peer. 459 * If connection never passed embryonic stage, just drop; 460 * else if don't need to let data drain, then can just drop anyways, 461 * else have to begin TCP shutdown process: mark socket disconnecting, 462 * drain unread data, state switch to reflect user close, and 463 * send segment (e.g. FIN) to peer. Socket will be really disconnected 464 * when peer sends FIN and acks ours. 465 * 466 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 467 */ 468 case PRU_DISCONNECT: 469 tp = tcp_disconnect(tp); 470 break; 471 472 /* 473 * Accept a connection. Essentially all the work is 474 * done at higher levels; just return the address 475 * of the peer, storing through addr. 476 */ 477 case PRU_ACCEPT: 478 #ifdef INET 479 if (inp) 480 in_setpeeraddr(inp, nam); 481 #endif 482 #ifdef INET6 483 if (in6p) 484 in6_setpeeraddr(in6p, nam); 485 #endif 486 break; 487 488 /* 489 * Mark the connection as being incapable of further output. 490 */ 491 case PRU_SHUTDOWN: 492 socantsendmore(so); 493 tp = tcp_usrclosed(tp); 494 if (tp) 495 error = tcp_output(tp); 496 break; 497 498 /* 499 * After a receive, possibly send window update to peer. 500 */ 501 case PRU_RCVD: 502 /* 503 * soreceive() calls this function when a user receives 504 * ancillary data on a listening socket. We don't call 505 * tcp_output in such a case, since there is no header 506 * template for a listening socket and hence the kernel 507 * will panic. 508 */ 509 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 510 (void) tcp_output(tp); 511 break; 512 513 /* 514 * Do a send by putting data in output queue and updating urgent 515 * marker if URG set. Possibly send more data. 516 */ 517 case PRU_SEND: 518 if (control && control->m_len) { 519 m_freem(control); 520 m_freem(m); 521 error = EINVAL; 522 break; 523 } 524 sbappendstream(&so->so_snd, m); 525 error = tcp_output(tp); 526 break; 527 528 /* 529 * Abort the TCP. 530 */ 531 case PRU_ABORT: 532 tp = tcp_drop(tp, ECONNABORTED); 533 break; 534 535 case PRU_SENSE: 536 /* 537 * stat: don't bother with a blocksize. 538 */ 539 splx(s); 540 return (0); 541 542 case PRU_RCVOOB: 543 if (control && control->m_len) { 544 m_freem(control); 545 m_freem(m); 546 error = EINVAL; 547 break; 548 } 549 if ((so->so_oobmark == 0 && 550 (so->so_state & SS_RCVATMARK) == 0) || 551 so->so_options & SO_OOBINLINE || 552 tp->t_oobflags & TCPOOB_HADDATA) { 553 error = EINVAL; 554 break; 555 } 556 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 557 error = EWOULDBLOCK; 558 break; 559 } 560 m->m_len = 1; 561 *mtod(m, char *) = tp->t_iobc; 562 if (((long)nam & MSG_PEEK) == 0) 563 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 564 break; 565 566 case PRU_SENDOOB: 567 if (sbspace(&so->so_snd) < -512) { 568 m_freem(m); 569 error = ENOBUFS; 570 break; 571 } 572 /* 573 * According to RFC961 (Assigned Protocols), 574 * the urgent pointer points to the last octet 575 * of urgent data. We continue, however, 576 * to consider it to indicate the first octet 577 * of data past the urgent section. 578 * Otherwise, snd_up should be one lower. 579 */ 580 sbappendstream(&so->so_snd, m); 581 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 582 tp->t_force = 1; 583 error = tcp_output(tp); 584 tp->t_force = 0; 585 break; 586 587 case PRU_SOCKADDR: 588 #ifdef INET 589 if (inp) 590 in_setsockaddr(inp, nam); 591 #endif 592 #ifdef INET6 593 if (in6p) 594 in6_setsockaddr(in6p, nam); 595 #endif 596 break; 597 598 case PRU_PEERADDR: 599 #ifdef INET 600 if (inp) 601 in_setpeeraddr(inp, nam); 602 #endif 603 #ifdef INET6 604 if (in6p) 605 in6_setpeeraddr(in6p, nam); 606 #endif 607 break; 608 609 default: 610 panic("tcp_usrreq"); 611 } 612 #ifdef TCP_DEBUG 613 if (tp && (so->so_options & SO_DEBUG)) 614 tcp_trace(TA_USER, ostate, tp, NULL, req); 615 #endif 616 617 release: 618 splx(s); 619 return (error); 620 } 621 622 static void 623 change_keepalive(struct socket *so, struct tcpcb *tp) 624 { 625 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 626 TCP_TIMER_DISARM(tp, TCPT_KEEP); 627 TCP_TIMER_DISARM(tp, TCPT_2MSL); 628 629 if (tp->t_state == TCPS_SYN_RECEIVED || 630 tp->t_state == TCPS_SYN_SENT) { 631 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 632 } else if (so->so_options & SO_KEEPALIVE && 633 tp->t_state <= TCPS_CLOSE_WAIT) { 634 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 635 } else { 636 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 637 } 638 639 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 640 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 641 } 642 643 644 int 645 tcp_ctloutput(int op, struct socket *so, int level, int optname, 646 struct mbuf **mp) 647 { 648 int error = 0, s; 649 struct inpcb *inp; 650 #ifdef INET6 651 struct in6pcb *in6p; 652 #endif 653 struct tcpcb *tp; 654 struct mbuf *m; 655 int i; 656 u_int ui; 657 int family; /* family of the socket */ 658 659 family = so->so_proto->pr_domain->dom_family; 660 661 s = splsoftnet(); 662 switch (family) { 663 #ifdef INET 664 case PF_INET: 665 inp = sotoinpcb(so); 666 #ifdef INET6 667 in6p = NULL; 668 #endif 669 break; 670 #endif 671 #ifdef INET6 672 case PF_INET6: 673 inp = NULL; 674 in6p = sotoin6pcb(so); 675 break; 676 #endif 677 default: 678 splx(s); 679 panic("%s: af %d", __func__, family); 680 } 681 #ifndef INET6 682 if (inp == NULL) 683 #else 684 if (inp == NULL && in6p == NULL) 685 #endif 686 { 687 splx(s); 688 if (op == PRCO_SETOPT && *mp) 689 (void) m_free(*mp); 690 return (ECONNRESET); 691 } 692 if (level != IPPROTO_TCP) { 693 switch (family) { 694 #ifdef INET 695 case PF_INET: 696 error = ip_ctloutput(op, so, level, optname, mp); 697 break; 698 #endif 699 #ifdef INET6 700 case PF_INET6: 701 error = ip6_ctloutput(op, so, level, optname, mp); 702 break; 703 #endif 704 } 705 splx(s); 706 return (error); 707 } 708 if (inp) 709 tp = intotcpcb(inp); 710 #ifdef INET6 711 else if (in6p) 712 tp = in6totcpcb(in6p); 713 #endif 714 else 715 tp = NULL; 716 717 switch (op) { 718 719 case PRCO_SETOPT: 720 m = *mp; 721 switch (optname) { 722 723 #ifdef TCP_SIGNATURE 724 case TCP_MD5SIG: 725 if (m == NULL || m->m_len < sizeof (int)) 726 error = EINVAL; 727 if (error) 728 break; 729 if (*mtod(m, int *) > 0) 730 tp->t_flags |= TF_SIGNATURE; 731 else 732 tp->t_flags &= ~TF_SIGNATURE; 733 break; 734 #endif /* TCP_SIGNATURE */ 735 736 case TCP_NODELAY: 737 if (m == NULL || m->m_len < sizeof (int)) 738 error = EINVAL; 739 else if (*mtod(m, int *)) 740 tp->t_flags |= TF_NODELAY; 741 else 742 tp->t_flags &= ~TF_NODELAY; 743 break; 744 745 case TCP_MAXSEG: 746 if (m && m->m_len >= sizeof(int) && 747 (i = *mtod(m, int *)) > 0 && 748 i <= tp->t_peermss) 749 tp->t_peermss = i; /* limit on send size */ 750 else 751 error = EINVAL; 752 break; 753 #ifdef notyet 754 case TCP_CONGCTL: 755 if (m == NULL) 756 error = EINVAL; 757 error = tcp_congctl_select(tp, mtod(m, char *)); 758 #endif 759 break; 760 761 case TCP_KEEPIDLE: 762 if (m && m->m_len >= sizeof(u_int) && 763 (ui = *mtod(m, u_int *)) > 0) { 764 tp->t_keepidle = ui; 765 change_keepalive(so, tp); 766 } else 767 error = EINVAL; 768 break; 769 770 case TCP_KEEPINTVL: 771 if (m && m->m_len >= sizeof(u_int) && 772 (ui = *mtod(m, u_int *)) > 0) { 773 tp->t_keepintvl = ui; 774 change_keepalive(so, tp); 775 } else 776 error = EINVAL; 777 break; 778 779 case TCP_KEEPCNT: 780 if (m && m->m_len >= sizeof(u_int) && 781 (ui = *mtod(m, u_int *)) > 0) { 782 tp->t_keepcnt = ui; 783 change_keepalive(so, tp); 784 } else 785 error = EINVAL; 786 break; 787 788 case TCP_KEEPINIT: 789 if (m && m->m_len >= sizeof(u_int) && 790 (ui = *mtod(m, u_int *)) > 0) { 791 tp->t_keepinit = ui; 792 change_keepalive(so, tp); 793 } else 794 error = EINVAL; 795 break; 796 797 default: 798 error = ENOPROTOOPT; 799 break; 800 } 801 if (m) 802 (void) m_free(m); 803 break; 804 805 case PRCO_GETOPT: 806 *mp = m = m_get(M_WAIT, MT_SOOPTS); 807 m->m_len = sizeof(int); 808 MCLAIM(m, so->so_mowner); 809 810 switch (optname) { 811 #ifdef TCP_SIGNATURE 812 case TCP_MD5SIG: 813 *mtod(m, int *) = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 814 break; 815 #endif 816 case TCP_NODELAY: 817 *mtod(m, int *) = tp->t_flags & TF_NODELAY; 818 break; 819 case TCP_MAXSEG: 820 *mtod(m, int *) = tp->t_peermss; 821 break; 822 #ifdef notyet 823 case TCP_CONGCTL: 824 break; 825 #endif 826 default: 827 error = ENOPROTOOPT; 828 break; 829 } 830 break; 831 } 832 splx(s); 833 return (error); 834 } 835 836 #ifndef TCP_SENDSPACE 837 #define TCP_SENDSPACE 1024*32 838 #endif 839 int tcp_sendspace = TCP_SENDSPACE; 840 #ifndef TCP_RECVSPACE 841 #define TCP_RECVSPACE 1024*32 842 #endif 843 int tcp_recvspace = TCP_RECVSPACE; 844 845 /* 846 * Attach TCP protocol to socket, allocating 847 * internet protocol control block, tcp control block, 848 * bufer space, and entering LISTEN state if to accept connections. 849 */ 850 int 851 tcp_attach(struct socket *so) 852 { 853 struct tcpcb *tp; 854 struct inpcb *inp; 855 #ifdef INET6 856 struct in6pcb *in6p; 857 #endif 858 int error; 859 int family; /* family of the socket */ 860 861 family = so->so_proto->pr_domain->dom_family; 862 863 #ifdef MBUFTRACE 864 so->so_mowner = &tcp_sock_mowner; 865 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 866 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 867 #endif 868 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 869 error = soreserve(so, tcp_sendspace, tcp_recvspace); 870 if (error) 871 return (error); 872 } 873 874 so->so_rcv.sb_flags |= SB_AUTOSIZE; 875 so->so_snd.sb_flags |= SB_AUTOSIZE; 876 877 switch (family) { 878 #ifdef INET 879 case PF_INET: 880 error = in_pcballoc(so, &tcbtable); 881 if (error) 882 return (error); 883 inp = sotoinpcb(so); 884 #ifdef INET6 885 in6p = NULL; 886 #endif 887 break; 888 #endif 889 #ifdef INET6 890 case PF_INET6: 891 error = in6_pcballoc(so, &tcbtable); 892 if (error) 893 return (error); 894 inp = NULL; 895 in6p = sotoin6pcb(so); 896 break; 897 #endif 898 default: 899 return EAFNOSUPPORT; 900 } 901 if (inp) 902 tp = tcp_newtcpcb(family, (void *)inp); 903 #ifdef INET6 904 else if (in6p) 905 tp = tcp_newtcpcb(family, (void *)in6p); 906 #endif 907 else 908 tp = NULL; 909 910 if (tp == 0) { 911 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 912 913 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 914 #ifdef INET 915 if (inp) 916 in_pcbdetach(inp); 917 #endif 918 #ifdef INET6 919 if (in6p) 920 in6_pcbdetach(in6p); 921 #endif 922 so->so_state |= nofd; 923 return (ENOBUFS); 924 } 925 tp->t_state = TCPS_CLOSED; 926 return (0); 927 } 928 929 /* 930 * Initiate (or continue) disconnect. 931 * If embryonic state, just send reset (once). 932 * If in ``let data drain'' option and linger null, just drop. 933 * Otherwise (hard), mark socket disconnecting and drop 934 * current input data; switch states based on user close, and 935 * send segment to peer (with FIN). 936 */ 937 struct tcpcb * 938 tcp_disconnect(struct tcpcb *tp) 939 { 940 struct socket *so; 941 942 if (tp->t_inpcb) 943 so = tp->t_inpcb->inp_socket; 944 #ifdef INET6 945 else if (tp->t_in6pcb) 946 so = tp->t_in6pcb->in6p_socket; 947 #endif 948 else 949 so = NULL; 950 951 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 952 tp = tcp_close(tp); 953 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 954 tp = tcp_drop(tp, 0); 955 else { 956 soisdisconnecting(so); 957 sbflush(&so->so_rcv); 958 tp = tcp_usrclosed(tp); 959 if (tp) 960 (void) tcp_output(tp); 961 } 962 return (tp); 963 } 964 965 /* 966 * User issued close, and wish to trail through shutdown states: 967 * if never received SYN, just forget it. If got a SYN from peer, 968 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 969 * If already got a FIN from peer, then almost done; go to LAST_ACK 970 * state. In all other cases, have already sent FIN to peer (e.g. 971 * after PRU_SHUTDOWN), and just have to play tedious game waiting 972 * for peer to send FIN or not respond to keep-alives, etc. 973 * We can let the user exit from the close as soon as the FIN is acked. 974 */ 975 struct tcpcb * 976 tcp_usrclosed(struct tcpcb *tp) 977 { 978 979 switch (tp->t_state) { 980 981 case TCPS_CLOSED: 982 case TCPS_LISTEN: 983 case TCPS_SYN_SENT: 984 tp->t_state = TCPS_CLOSED; 985 tp = tcp_close(tp); 986 break; 987 988 case TCPS_SYN_RECEIVED: 989 case TCPS_ESTABLISHED: 990 tp->t_state = TCPS_FIN_WAIT_1; 991 break; 992 993 case TCPS_CLOSE_WAIT: 994 tp->t_state = TCPS_LAST_ACK; 995 break; 996 } 997 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 998 struct socket *so; 999 if (tp->t_inpcb) 1000 so = tp->t_inpcb->inp_socket; 1001 #ifdef INET6 1002 else if (tp->t_in6pcb) 1003 so = tp->t_in6pcb->in6p_socket; 1004 #endif 1005 else 1006 so = NULL; 1007 if (so) 1008 soisdisconnected(so); 1009 /* 1010 * If we are in FIN_WAIT_2, we arrived here because the 1011 * application did a shutdown of the send side. Like the 1012 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1013 * a full close, we start a timer to make sure sockets are 1014 * not left in FIN_WAIT_2 forever. 1015 */ 1016 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1017 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1018 } 1019 return (tp); 1020 } 1021 1022 /* 1023 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1024 * than 32. 1025 */ 1026 static int 1027 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1028 { 1029 int error, mssdflt; 1030 struct sysctlnode node; 1031 1032 mssdflt = tcp_mssdflt; 1033 node = *rnode; 1034 node.sysctl_data = &mssdflt; 1035 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1036 if (error || newp == NULL) 1037 return (error); 1038 1039 if (mssdflt < 32) 1040 return (EINVAL); 1041 tcp_mssdflt = mssdflt; 1042 1043 return (0); 1044 } 1045 1046 /* 1047 * sysctl helper routine for setting port related values under 1048 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1049 * additional checks for each type. this code has placed in 1050 * tcp_input.c since INET and INET6 both use the same tcp code. 1051 * 1052 * this helper is not static so that both inet and inet6 can use it. 1053 */ 1054 int 1055 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1056 { 1057 int error, tmp; 1058 int apmin, apmax; 1059 #ifndef IPNOPRIVPORTS 1060 int lpmin, lpmax; 1061 #endif /* IPNOPRIVPORTS */ 1062 struct sysctlnode node; 1063 1064 if (namelen != 0) 1065 return (EINVAL); 1066 1067 switch (name[-3]) { 1068 #ifdef INET 1069 case PF_INET: 1070 apmin = anonportmin; 1071 apmax = anonportmax; 1072 #ifndef IPNOPRIVPORTS 1073 lpmin = lowportmin; 1074 lpmax = lowportmax; 1075 #endif /* IPNOPRIVPORTS */ 1076 break; 1077 #endif /* INET */ 1078 #ifdef INET6 1079 case PF_INET6: 1080 apmin = ip6_anonportmin; 1081 apmax = ip6_anonportmax; 1082 #ifndef IPNOPRIVPORTS 1083 lpmin = ip6_lowportmin; 1084 lpmax = ip6_lowportmax; 1085 #endif /* IPNOPRIVPORTS */ 1086 break; 1087 #endif /* INET6 */ 1088 default: 1089 return (EINVAL); 1090 } 1091 1092 /* 1093 * insert temporary copy into node, perform lookup on 1094 * temporary, then restore pointer 1095 */ 1096 node = *rnode; 1097 tmp = *(int*)rnode->sysctl_data; 1098 node.sysctl_data = &tmp; 1099 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1100 if (error || newp == NULL) 1101 return (error); 1102 1103 /* 1104 * simple port range check 1105 */ 1106 if (tmp < 0 || tmp > 65535) 1107 return (EINVAL); 1108 1109 /* 1110 * per-node range checks 1111 */ 1112 switch (rnode->sysctl_num) { 1113 case IPCTL_ANONPORTMIN: 1114 if (tmp >= apmax) 1115 return (EINVAL); 1116 #ifndef IPNOPRIVPORTS 1117 if (tmp < IPPORT_RESERVED) 1118 return (EINVAL); 1119 #endif /* IPNOPRIVPORTS */ 1120 break; 1121 1122 case IPCTL_ANONPORTMAX: 1123 if (apmin >= tmp) 1124 return (EINVAL); 1125 #ifndef IPNOPRIVPORTS 1126 if (tmp < IPPORT_RESERVED) 1127 return (EINVAL); 1128 #endif /* IPNOPRIVPORTS */ 1129 break; 1130 1131 #ifndef IPNOPRIVPORTS 1132 case IPCTL_LOWPORTMIN: 1133 if (tmp >= lpmax || 1134 tmp > IPPORT_RESERVEDMAX || 1135 tmp < IPPORT_RESERVEDMIN) 1136 return (EINVAL); 1137 break; 1138 1139 case IPCTL_LOWPORTMAX: 1140 if (lpmin >= tmp || 1141 tmp > IPPORT_RESERVEDMAX || 1142 tmp < IPPORT_RESERVEDMIN) 1143 return (EINVAL); 1144 break; 1145 #endif /* IPNOPRIVPORTS */ 1146 1147 default: 1148 return (EINVAL); 1149 } 1150 1151 *(int*)rnode->sysctl_data = tmp; 1152 1153 return (0); 1154 } 1155 1156 /* 1157 * The superuser can drop any connection. Normal users can only drop 1158 * their own connections. 1159 */ 1160 static inline int 1161 check_sockuid(struct socket *sockp, kauth_cred_t cred) 1162 { 1163 uid_t sockuid; 1164 1165 sockuid = sockp->so_uidinfo->ui_uid; 1166 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0 || 1167 sockuid == kauth_cred_getuid(cred) || 1168 sockuid == kauth_cred_geteuid(cred)) 1169 return 0; 1170 return EACCES; 1171 } 1172 1173 static inline int 1174 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1175 { 1176 size_t sz; 1177 int error; 1178 uid_t uid; 1179 1180 uid = sockp->so_uidinfo->ui_uid; 1181 if (oldp) { 1182 sz = MIN(sizeof(uid), *oldlenp); 1183 error = copyout(&uid, oldp, sz); 1184 if (error) 1185 return error; 1186 } 1187 *oldlenp = sizeof(uid); 1188 return 0; 1189 } 1190 1191 static inline int 1192 inet4_ident_core(struct in_addr raddr, u_int rport, 1193 struct in_addr laddr, u_int lport, 1194 void *oldp, size_t *oldlenp, 1195 struct lwp *l, int dodrop) 1196 { 1197 struct inpcb *inp; 1198 struct socket *sockp; 1199 1200 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport); 1201 1202 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1203 return ESRCH; 1204 1205 if (dodrop) { 1206 struct tcpcb *tp; 1207 1208 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1209 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1210 return ESRCH; 1211 1212 if (check_sockuid(inp->inp_socket, l->l_cred) != 0) 1213 return EACCES; 1214 1215 (void)tcp_drop(tp, ECONNABORTED); 1216 return 0; 1217 } 1218 else 1219 return copyout_uid(sockp, oldp, oldlenp); 1220 } 1221 1222 #ifdef INET6 1223 static inline int 1224 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1225 struct in6_addr *laddr, u_int lport, 1226 void *oldp, size_t *oldlenp, 1227 struct lwp *l, int dodrop) 1228 { 1229 struct in6pcb *in6p; 1230 struct socket *sockp; 1231 1232 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1233 1234 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1235 return ESRCH; 1236 1237 if (dodrop) { 1238 struct tcpcb *tp; 1239 1240 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1241 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1242 return ESRCH; 1243 1244 if (check_sockuid(in6p->in6p_socket, l->l_cred) != 0) 1245 return EACCES; 1246 1247 (void)tcp_drop(tp, ECONNABORTED); 1248 return 0; 1249 } 1250 else 1251 return copyout_uid(sockp, oldp, oldlenp); 1252 } 1253 #endif 1254 1255 /* 1256 * sysctl helper routine for the net.inet.tcp.drop and 1257 * net.inet6.tcp6.drop nodes. 1258 */ 1259 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1260 1261 /* 1262 * sysctl helper routine for the net.inet.tcp.ident and 1263 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1264 * old way of looking up the ident information for ipv4 which involves 1265 * stuffing the port/addr pairs into the mib lookup. 1266 */ 1267 static int 1268 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1269 { 1270 #ifdef INET 1271 struct sockaddr_in *si4[2]; 1272 #endif /* INET */ 1273 #ifdef INET6 1274 struct sockaddr_in6 *si6[2]; 1275 #endif /* INET6 */ 1276 struct sockaddr_storage sa[2]; 1277 int error, pf, dodrop, s; 1278 1279 dodrop = name[-1] == TCPCTL_DROP; 1280 if (dodrop) { 1281 if (oldp != NULL || *oldlenp != 0) 1282 return EINVAL; 1283 if (newp == NULL) 1284 return EPERM; 1285 if (newlen < sizeof(sa)) 1286 return ENOMEM; 1287 } 1288 if (namelen != 4 && namelen != 0) 1289 return EINVAL; 1290 if (name[-2] != IPPROTO_TCP) 1291 return EINVAL; 1292 pf = name[-3]; 1293 1294 /* old style lookup, ipv4 only */ 1295 if (namelen == 4) { 1296 #ifdef INET 1297 struct in_addr laddr, raddr; 1298 u_int lport, rport; 1299 1300 if (pf != PF_INET) 1301 return EPROTONOSUPPORT; 1302 raddr.s_addr = (uint32_t)name[0]; 1303 rport = (u_int)name[1]; 1304 laddr.s_addr = (uint32_t)name[2]; 1305 lport = (u_int)name[3]; 1306 1307 s = splsoftnet(); 1308 error = inet4_ident_core(raddr, rport, laddr, lport, 1309 oldp, oldlenp, l, dodrop); 1310 splx(s); 1311 return error; 1312 #else /* INET */ 1313 return EINVAL; 1314 #endif /* INET */ 1315 } 1316 1317 if (newp == NULL || newlen != sizeof(sa)) 1318 return EINVAL; 1319 error = copyin(newp, &sa, newlen); 1320 if (error) 1321 return error; 1322 1323 /* 1324 * requested families must match 1325 */ 1326 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1327 return EINVAL; 1328 1329 switch (pf) { 1330 #ifdef INET6 1331 case PF_INET6: 1332 si6[0] = (struct sockaddr_in6*)&sa[0]; 1333 si6[1] = (struct sockaddr_in6*)&sa[1]; 1334 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1335 si6[1]->sin6_len != sizeof(*si6[1])) 1336 return EINVAL; 1337 1338 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1339 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1340 error = sa6_embedscope(si6[0], ip6_use_defzone); 1341 if (error) 1342 return error; 1343 error = sa6_embedscope(si6[1], ip6_use_defzone); 1344 if (error) 1345 return error; 1346 1347 s = splsoftnet(); 1348 error = inet6_ident_core(&si6[0]->sin6_addr, 1349 si6[0]->sin6_port, &si6[1]->sin6_addr, 1350 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1351 splx(s); 1352 return error; 1353 } 1354 1355 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1356 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1357 return EINVAL; 1358 1359 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1360 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1361 /*FALLTHROUGH*/ 1362 #endif /* INET6 */ 1363 #ifdef INET 1364 case PF_INET: 1365 si4[0] = (struct sockaddr_in*)&sa[0]; 1366 si4[1] = (struct sockaddr_in*)&sa[1]; 1367 if (si4[0]->sin_len != sizeof(*si4[0]) || 1368 si4[0]->sin_len != sizeof(*si4[1])) 1369 return EINVAL; 1370 1371 s = splsoftnet(); 1372 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1373 si4[1]->sin_addr, si4[1]->sin_port, 1374 oldp, oldlenp, l, dodrop); 1375 splx(s); 1376 return error; 1377 #endif /* INET */ 1378 default: 1379 return EPROTONOSUPPORT; 1380 } 1381 } 1382 1383 /* 1384 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1385 * inet/inet6, as well as raw pcbs for each. specifically not 1386 * declared static so that raw sockets and udp/udp6 can use it as 1387 * well. 1388 */ 1389 int 1390 sysctl_inpcblist(SYSCTLFN_ARGS) 1391 { 1392 #ifdef INET 1393 struct sockaddr_in *in; 1394 const struct inpcb *inp; 1395 #endif 1396 #ifdef INET6 1397 struct sockaddr_in6 *in6; 1398 const struct in6pcb *in6p; 1399 #endif 1400 /* 1401 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1402 * struct inpcbtable pointer, so we have to discard const. :-/ 1403 */ 1404 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1405 const struct inpcb_hdr *inph; 1406 struct tcpcb *tp; 1407 struct kinfo_pcb pcb; 1408 char *dp; 1409 u_int op, arg; 1410 size_t len, needed, elem_size, out_size; 1411 int error, elem_count, pf, proto, pf2; 1412 1413 if (namelen != 4) 1414 return (EINVAL); 1415 1416 if (oldp != NULL) { 1417 len = *oldlenp; 1418 elem_size = name[2]; 1419 elem_count = name[3]; 1420 if (elem_size != sizeof(pcb)) 1421 return EINVAL; 1422 } else { 1423 len = 0; 1424 elem_count = INT_MAX; 1425 elem_size = sizeof(pcb); 1426 } 1427 error = 0; 1428 dp = oldp; 1429 op = name[0]; 1430 arg = name[1]; 1431 out_size = elem_size; 1432 needed = 0; 1433 1434 if (namelen == 1 && name[0] == CTL_QUERY) 1435 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1436 1437 if (name - oname != 4) 1438 return (EINVAL); 1439 1440 pf = oname[1]; 1441 proto = oname[2]; 1442 pf2 = (oldp != NULL) ? pf : 0; 1443 1444 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1445 #ifdef INET 1446 inp = (const struct inpcb *)inph; 1447 #endif 1448 #ifdef INET6 1449 in6p = (const struct in6pcb *)inph; 1450 #endif 1451 1452 if (inph->inph_af != pf) 1453 continue; 1454 1455 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1456 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1457 NULL) != 0) 1458 continue; 1459 1460 memset(&pcb, 0, sizeof(pcb)); 1461 1462 pcb.ki_family = pf; 1463 pcb.ki_type = proto; 1464 1465 switch (pf2) { 1466 case 0: 1467 /* just probing for size */ 1468 break; 1469 #ifdef INET 1470 case PF_INET: 1471 pcb.ki_family = inp->inp_socket->so_proto-> 1472 pr_domain->dom_family; 1473 pcb.ki_type = inp->inp_socket->so_proto-> 1474 pr_type; 1475 pcb.ki_protocol = inp->inp_socket->so_proto-> 1476 pr_protocol; 1477 pcb.ki_pflags = inp->inp_flags; 1478 1479 pcb.ki_sostate = inp->inp_socket->so_state; 1480 pcb.ki_prstate = inp->inp_state; 1481 if (proto == IPPROTO_TCP) { 1482 tp = intotcpcb(inp); 1483 pcb.ki_tstate = tp->t_state; 1484 pcb.ki_tflags = tp->t_flags; 1485 } 1486 1487 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1488 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1489 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1490 1491 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1492 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1493 1494 in = satosin(&pcb.ki_src); 1495 in->sin_len = sizeof(*in); 1496 in->sin_family = pf; 1497 in->sin_port = inp->inp_lport; 1498 in->sin_addr = inp->inp_laddr; 1499 if (pcb.ki_prstate >= INP_CONNECTED) { 1500 in = satosin(&pcb.ki_dst); 1501 in->sin_len = sizeof(*in); 1502 in->sin_family = pf; 1503 in->sin_port = inp->inp_fport; 1504 in->sin_addr = inp->inp_faddr; 1505 } 1506 break; 1507 #endif 1508 #ifdef INET6 1509 case PF_INET6: 1510 pcb.ki_family = in6p->in6p_socket->so_proto-> 1511 pr_domain->dom_family; 1512 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1513 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1514 pr_protocol; 1515 pcb.ki_pflags = in6p->in6p_flags; 1516 1517 pcb.ki_sostate = in6p->in6p_socket->so_state; 1518 pcb.ki_prstate = in6p->in6p_state; 1519 if (proto == IPPROTO_TCP) { 1520 tp = in6totcpcb(in6p); 1521 pcb.ki_tstate = tp->t_state; 1522 pcb.ki_tflags = tp->t_flags; 1523 } 1524 1525 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1526 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1527 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1528 1529 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1530 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1531 1532 in6 = satosin6(&pcb.ki_src); 1533 in6->sin6_len = sizeof(*in6); 1534 in6->sin6_family = pf; 1535 in6->sin6_port = in6p->in6p_lport; 1536 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1537 in6->sin6_addr = in6p->in6p_laddr; 1538 in6->sin6_scope_id = 0; /* XXX? */ 1539 1540 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1541 in6 = satosin6(&pcb.ki_dst); 1542 in6->sin6_len = sizeof(*in6); 1543 in6->sin6_family = pf; 1544 in6->sin6_port = in6p->in6p_fport; 1545 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1546 in6->sin6_addr = in6p->in6p_faddr; 1547 in6->sin6_scope_id = 0; /* XXX? */ 1548 } 1549 break; 1550 #endif 1551 } 1552 1553 if (len >= elem_size && elem_count > 0) { 1554 error = copyout(&pcb, dp, out_size); 1555 if (error) 1556 return (error); 1557 dp += elem_size; 1558 len -= elem_size; 1559 } 1560 if (elem_count > 0) { 1561 needed += elem_size; 1562 if (elem_count != INT_MAX) 1563 elem_count--; 1564 } 1565 } 1566 1567 *oldlenp = needed; 1568 if (oldp == NULL) 1569 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1570 1571 return (error); 1572 } 1573 1574 static int 1575 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1576 { 1577 struct sysctlnode node; 1578 int error, r; 1579 char newname[TCPCC_MAXLEN]; 1580 1581 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1582 1583 node = *rnode; 1584 node.sysctl_data = newname; 1585 node.sysctl_size = sizeof(newname); 1586 1587 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1588 1589 if (error || 1590 newp == NULL || 1591 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1592 return error; 1593 1594 if ((r = tcp_congctl_select(NULL, newname))) 1595 return r; 1596 1597 return error; 1598 } 1599 1600 static int 1601 sysctl_tcp_keep(SYSCTLFN_ARGS) 1602 { 1603 int error; 1604 u_int tmp; 1605 struct sysctlnode node; 1606 1607 node = *rnode; 1608 tmp = *(u_int *)rnode->sysctl_data; 1609 node.sysctl_data = &tmp; 1610 1611 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1612 if (error || newp == NULL) 1613 return error; 1614 1615 *(u_int *)rnode->sysctl_data = tmp; 1616 tcp_tcpcb_template(); /* update the template */ 1617 return 0; 1618 } 1619 1620 1621 /* 1622 * this (second stage) setup routine is a replacement for tcp_sysctl() 1623 * (which is currently used for ipv4 and ipv6) 1624 */ 1625 static void 1626 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1627 const char *tcpname) 1628 { 1629 const struct sysctlnode *sack_node; 1630 const struct sysctlnode *abc_node; 1631 const struct sysctlnode *ecn_node; 1632 const struct sysctlnode *congctl_node; 1633 #ifdef TCP_DEBUG 1634 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1635 extern int tcp_debx; 1636 #endif 1637 1638 sysctl_createv(clog, 0, NULL, NULL, 1639 CTLFLAG_PERMANENT, 1640 CTLTYPE_NODE, "net", NULL, 1641 NULL, 0, NULL, 0, 1642 CTL_NET, CTL_EOL); 1643 sysctl_createv(clog, 0, NULL, NULL, 1644 CTLFLAG_PERMANENT, 1645 CTLTYPE_NODE, pfname, NULL, 1646 NULL, 0, NULL, 0, 1647 CTL_NET, pf, CTL_EOL); 1648 sysctl_createv(clog, 0, NULL, NULL, 1649 CTLFLAG_PERMANENT, 1650 CTLTYPE_NODE, tcpname, 1651 SYSCTL_DESCR("TCP related settings"), 1652 NULL, 0, NULL, 0, 1653 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1654 1655 sysctl_createv(clog, 0, NULL, NULL, 1656 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1657 CTLTYPE_INT, "rfc1323", 1658 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1659 NULL, 0, &tcp_do_rfc1323, 0, 1660 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1661 sysctl_createv(clog, 0, NULL, NULL, 1662 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1663 CTLTYPE_INT, "sendspace", 1664 SYSCTL_DESCR("Default TCP send buffer size"), 1665 NULL, 0, &tcp_sendspace, 0, 1666 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1667 sysctl_createv(clog, 0, NULL, NULL, 1668 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1669 CTLTYPE_INT, "recvspace", 1670 SYSCTL_DESCR("Default TCP receive buffer size"), 1671 NULL, 0, &tcp_recvspace, 0, 1672 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1673 sysctl_createv(clog, 0, NULL, NULL, 1674 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1675 CTLTYPE_INT, "mssdflt", 1676 SYSCTL_DESCR("Default maximum segment size"), 1677 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1678 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1679 sysctl_createv(clog, 0, NULL, NULL, 1680 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1681 CTLTYPE_INT, "minmss", 1682 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1683 NULL, 0, &tcp_minmss, 0, 1684 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1685 sysctl_createv(clog, 0, NULL, NULL, 1686 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1687 CTLTYPE_INT, "syn_cache_limit", 1688 SYSCTL_DESCR("Maximum number of entries in the TCP " 1689 "compressed state engine"), 1690 NULL, 0, &tcp_syn_cache_limit, 0, 1691 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1692 CTL_EOL); 1693 sysctl_createv(clog, 0, NULL, NULL, 1694 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1695 CTLTYPE_INT, "syn_bucket_limit", 1696 SYSCTL_DESCR("Maximum number of entries per hash " 1697 "bucket in the TCP compressed state " 1698 "engine"), 1699 NULL, 0, &tcp_syn_bucket_limit, 0, 1700 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1701 CTL_EOL); 1702 #if 0 /* obsoleted */ 1703 sysctl_createv(clog, 0, NULL, NULL, 1704 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1705 CTLTYPE_INT, "syn_cache_interval", 1706 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1707 NULL, 0, &tcp_syn_cache_interval, 0, 1708 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1709 CTL_EOL); 1710 #endif 1711 sysctl_createv(clog, 0, NULL, NULL, 1712 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1713 CTLTYPE_INT, "init_win", 1714 SYSCTL_DESCR("Initial TCP congestion window"), 1715 NULL, 0, &tcp_init_win, 0, 1716 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1717 sysctl_createv(clog, 0, NULL, NULL, 1718 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1719 CTLTYPE_INT, "mss_ifmtu", 1720 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1721 NULL, 0, &tcp_mss_ifmtu, 0, 1722 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1723 sysctl_createv(clog, 0, NULL, &sack_node, 1724 CTLFLAG_PERMANENT, 1725 CTLTYPE_NODE, "sack", 1726 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1727 NULL, 0, NULL, 0, 1728 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1729 1730 /* Congctl subtree */ 1731 sysctl_createv(clog, 0, NULL, &congctl_node, 1732 CTLFLAG_PERMANENT, 1733 CTLTYPE_NODE, "congctl", 1734 SYSCTL_DESCR("TCP Congestion Control"), 1735 NULL, 0, NULL, 0, 1736 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1737 sysctl_createv(clog, 0, &congctl_node, NULL, 1738 CTLFLAG_PERMANENT, 1739 CTLTYPE_STRING, "available", 1740 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1741 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1742 sysctl_createv(clog, 0, &congctl_node, NULL, 1743 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1744 CTLTYPE_STRING, "selected", 1745 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1746 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1747 CTL_CREATE, CTL_EOL); 1748 1749 sysctl_createv(clog, 0, NULL, NULL, 1750 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1751 CTLTYPE_INT, "win_scale", 1752 SYSCTL_DESCR("Use RFC1323 window scale options"), 1753 NULL, 0, &tcp_do_win_scale, 0, 1754 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1755 sysctl_createv(clog, 0, NULL, NULL, 1756 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1757 CTLTYPE_INT, "timestamps", 1758 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1759 NULL, 0, &tcp_do_timestamps, 0, 1760 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1761 sysctl_createv(clog, 0, NULL, NULL, 1762 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1763 CTLTYPE_INT, "compat_42", 1764 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1765 NULL, 0, &tcp_compat_42, 0, 1766 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1767 sysctl_createv(clog, 0, NULL, NULL, 1768 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1769 CTLTYPE_INT, "cwm", 1770 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1771 "Monitoring"), 1772 NULL, 0, &tcp_cwm, 0, 1773 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1774 sysctl_createv(clog, 0, NULL, NULL, 1775 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1776 CTLTYPE_INT, "cwm_burstsize", 1777 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1778 "burst count in packets"), 1779 NULL, 0, &tcp_cwm_burstsize, 0, 1780 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1781 CTL_EOL); 1782 sysctl_createv(clog, 0, NULL, NULL, 1783 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1784 CTLTYPE_INT, "ack_on_push", 1785 SYSCTL_DESCR("Immediately return ACK when PSH is " 1786 "received"), 1787 NULL, 0, &tcp_ack_on_push, 0, 1788 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1789 sysctl_createv(clog, 0, NULL, NULL, 1790 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1791 CTLTYPE_INT, "keepidle", 1792 SYSCTL_DESCR("Allowed connection idle ticks before a " 1793 "keepalive probe is sent"), 1794 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1795 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1796 sysctl_createv(clog, 0, NULL, NULL, 1797 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1798 CTLTYPE_INT, "keepintvl", 1799 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1800 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1801 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1802 sysctl_createv(clog, 0, NULL, NULL, 1803 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1804 CTLTYPE_INT, "keepcnt", 1805 SYSCTL_DESCR("Number of keepalive probes to send"), 1806 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1807 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1808 sysctl_createv(clog, 0, NULL, NULL, 1809 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1810 CTLTYPE_INT, "slowhz", 1811 SYSCTL_DESCR("Keepalive ticks per second"), 1812 NULL, PR_SLOWHZ, NULL, 0, 1813 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1814 sysctl_createv(clog, 0, NULL, NULL, 1815 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1816 CTLTYPE_INT, "log_refused", 1817 SYSCTL_DESCR("Log refused TCP connections"), 1818 NULL, 0, &tcp_log_refused, 0, 1819 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1820 #if 0 /* obsoleted */ 1821 sysctl_createv(clog, 0, NULL, NULL, 1822 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1823 CTLTYPE_INT, "rstratelimit", NULL, 1824 NULL, 0, &tcp_rst_ratelim, 0, 1825 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1826 #endif 1827 sysctl_createv(clog, 0, NULL, NULL, 1828 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1829 CTLTYPE_INT, "rstppslimit", 1830 SYSCTL_DESCR("Maximum number of RST packets to send " 1831 "per second"), 1832 NULL, 0, &tcp_rst_ppslim, 0, 1833 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1834 sysctl_createv(clog, 0, NULL, NULL, 1835 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1836 CTLTYPE_INT, "delack_ticks", 1837 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1838 NULL, 0, &tcp_delack_ticks, 0, 1839 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1840 sysctl_createv(clog, 0, NULL, NULL, 1841 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1842 CTLTYPE_INT, "init_win_local", 1843 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1844 NULL, 0, &tcp_init_win_local, 0, 1845 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1846 CTL_EOL); 1847 sysctl_createv(clog, 0, NULL, NULL, 1848 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1849 CTLTYPE_STRUCT, "ident", 1850 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1851 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1852 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1853 sysctl_createv(clog, 0, NULL, NULL, 1854 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1855 CTLTYPE_INT, "do_loopback_cksum", 1856 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1857 NULL, 0, &tcp_do_loopback_cksum, 0, 1858 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1859 CTL_EOL); 1860 sysctl_createv(clog, 0, NULL, NULL, 1861 CTLFLAG_PERMANENT, 1862 CTLTYPE_STRUCT, "pcblist", 1863 SYSCTL_DESCR("TCP protocol control block list"), 1864 sysctl_inpcblist, 0, &tcbtable, 0, 1865 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1866 CTL_EOL); 1867 sysctl_createv(clog, 0, NULL, NULL, 1868 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1869 CTLTYPE_INT, "keepinit", 1870 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1871 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1872 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1873 1874 /* TCP socket buffers auto-sizing nodes */ 1875 sysctl_createv(clog, 0, NULL, NULL, 1876 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1877 CTLTYPE_INT, "recvbuf_auto", 1878 SYSCTL_DESCR("Enable automatic receive " 1879 "buffer sizing (experimental)"), 1880 NULL, 0, &tcp_do_autorcvbuf, 0, 1881 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1882 sysctl_createv(clog, 0, NULL, NULL, 1883 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1884 CTLTYPE_INT, "recvbuf_inc", 1885 SYSCTL_DESCR("Incrementor step size of " 1886 "automatic receive buffer"), 1887 NULL, 0, &tcp_autorcvbuf_inc, 0, 1888 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1889 sysctl_createv(clog, 0, NULL, NULL, 1890 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1891 CTLTYPE_INT, "recvbuf_max", 1892 SYSCTL_DESCR("Max size of automatic receive buffer"), 1893 NULL, 0, &tcp_autorcvbuf_max, 0, 1894 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1895 1896 sysctl_createv(clog, 0, NULL, NULL, 1897 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1898 CTLTYPE_INT, "sendbuf_auto", 1899 SYSCTL_DESCR("Enable automatic send " 1900 "buffer sizing (experimental)"), 1901 NULL, 0, &tcp_do_autosndbuf, 0, 1902 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1903 sysctl_createv(clog, 0, NULL, NULL, 1904 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1905 CTLTYPE_INT, "sendbuf_inc", 1906 SYSCTL_DESCR("Incrementor step size of " 1907 "automatic send buffer"), 1908 NULL, 0, &tcp_autosndbuf_inc, 0, 1909 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1910 sysctl_createv(clog, 0, NULL, NULL, 1911 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1912 CTLTYPE_INT, "sendbuf_max", 1913 SYSCTL_DESCR("Max size of automatic send buffer"), 1914 NULL, 0, &tcp_autosndbuf_max, 0, 1915 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1916 1917 /* ECN subtree */ 1918 sysctl_createv(clog, 0, NULL, &ecn_node, 1919 CTLFLAG_PERMANENT, 1920 CTLTYPE_NODE, "ecn", 1921 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1922 NULL, 0, NULL, 0, 1923 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1924 sysctl_createv(clog, 0, &ecn_node, NULL, 1925 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1926 CTLTYPE_INT, "enable", 1927 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1928 "Notification"), 1929 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1930 sysctl_createv(clog, 0, &ecn_node, NULL, 1931 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1932 CTLTYPE_INT, "maxretries", 1933 SYSCTL_DESCR("Number of times to retry ECN setup " 1934 "before disabling ECN on the connection"), 1935 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1936 1937 /* SACK gets it's own little subtree. */ 1938 sysctl_createv(clog, 0, NULL, &sack_node, 1939 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1940 CTLTYPE_INT, "enable", 1941 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1942 NULL, 0, &tcp_do_sack, 0, 1943 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1944 sysctl_createv(clog, 0, NULL, &sack_node, 1945 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1946 CTLTYPE_INT, "maxholes", 1947 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1948 NULL, 0, &tcp_sack_tp_maxholes, 0, 1949 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1950 sysctl_createv(clog, 0, NULL, &sack_node, 1951 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1952 CTLTYPE_INT, "globalmaxholes", 1953 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1954 NULL, 0, &tcp_sack_globalmaxholes, 0, 1955 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1956 sysctl_createv(clog, 0, NULL, &sack_node, 1957 CTLFLAG_PERMANENT, 1958 CTLTYPE_INT, "globalholes", 1959 SYSCTL_DESCR("Global number of TCP SACK holes"), 1960 NULL, 0, &tcp_sack_globalholes, 0, 1961 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1962 1963 sysctl_createv(clog, 0, NULL, NULL, 1964 CTLFLAG_PERMANENT, 1965 CTLTYPE_STRUCT, "stats", 1966 SYSCTL_DESCR("TCP statistics"), 1967 NULL, 0, &tcpstat, sizeof(tcpstat), 1968 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1969 CTL_EOL); 1970 #ifdef TCP_DEBUG 1971 sysctl_createv(clog, 0, NULL, NULL, 1972 CTLFLAG_PERMANENT, 1973 CTLTYPE_STRUCT, "debug", 1974 SYSCTL_DESCR("TCP sockets debug information"), 1975 NULL, 0, &tcp_debug, sizeof(tcp_debug), 1976 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 1977 CTL_EOL); 1978 sysctl_createv(clog, 0, NULL, NULL, 1979 CTLFLAG_PERMANENT, 1980 CTLTYPE_INT, "debx", 1981 SYSCTL_DESCR("Number of TCP debug sockets messages"), 1982 NULL, 0, &tcp_debx, sizeof(tcp_debx), 1983 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 1984 CTL_EOL); 1985 #endif 1986 sysctl_createv(clog, 0, NULL, NULL, 1987 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1988 CTLTYPE_STRUCT, "drop", 1989 SYSCTL_DESCR("TCP drop connection"), 1990 sysctl_net_inet_tcp_drop, 0, NULL, 0, 1991 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 1992 #if NRND > 0 1993 sysctl_createv(clog, 0, NULL, NULL, 1994 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1995 CTLTYPE_INT, "iss_hash", 1996 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 1997 "hash computation"), 1998 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 1999 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2000 CTL_EOL); 2001 #endif 2002 2003 /* ABC subtree */ 2004 2005 sysctl_createv(clog, 0, NULL, &abc_node, 2006 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2007 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2008 NULL, 0, NULL, 0, 2009 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2010 sysctl_createv(clog, 0, &abc_node, NULL, 2011 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2012 CTLTYPE_INT, "enable", 2013 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2014 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2015 sysctl_createv(clog, 0, &abc_node, NULL, 2016 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2017 CTLTYPE_INT, "aggressive", 2018 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2019 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2020 } 2021 2022 /* 2023 * Sysctl for tcp variables. 2024 */ 2025 #ifdef INET 2026 SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup") 2027 { 2028 2029 sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp"); 2030 } 2031 #endif /* INET */ 2032 2033 #ifdef INET6 2034 SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup") 2035 { 2036 2037 sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6"); 2038 } 2039 #endif /* INET6 */ 2040
Indexes created Sun Sep 21 20:09:37 GMT 2025